77 little obtuse in female. Tegmina extending a triHe beyond the ti]) of hind femora in both sexes ; the latter very heavy at base. Prosternal spine short, a little transverse, the apex blinit. Pronotam above with a large triangular black spot immediately back of last transverse sulcus. In soma specimens the portion back of this light brown or ferruginous, and in still others dirty white. Occasionally this white band etxends also upon the back edge of the lateral sides of 7Dronotum so as to give the insect the appearance of having a light collar or light colored band immediately in front of base of wings. Tegmina irregularly mottled throughout with dusky dots. Hind femora marked above with three dusky bands: the knees also somewhat dusky: several of the abdomional segments with their sides more or less black : last ventral segment of ' the male with the edges dusky. Cerci moderately slender, elongate, and bowed inward on aT^ical half.
Length: of body, d' K) mm, ? 20-23 mm: of pronotum, cJ' 8.75 mm, ? 5-5.5 mm; of tegmina, d 18 mm, ? 15-17 mm : of hind femora, c? 10 mm, ? 12 mm.
A common insect on the dryer portions of the camp in southern Santa Fe and eastern Cordoba, where it occurs during the latter part of winter and earlv spring. (O. Thomas, A. Kurriger).
I). Beir/ii Stal. Resistencia, Chaco (Giglio-Tos) : Corrientes, Buenos "Aires and Parana (C. Stal); Cordoba (F. Schulz, H, Stempelmann) ; Carcarana and Rosario de Santa Fe (O. Thomas, A. Kurriger).
Bichrop/Ks rlftctus n. sp.
! General color bright greenish yellow : the occiput, lateral edges of i^ronotum in advance of postreior transverse sulcus, along with dorsal edges and discal field of tegmina brown : the three basal segments of abdomen at sides, and knees of hind femora both internally and etxernally, black: posterior tibiae deep greenish blue; hind femora with the lower sulcus yellow, the inner face near basal half l)right
78 red, this latter color shining through to the outside, beyond which the femora are more or less olivaceous, their upper edges marked with two dusky patches towards the apex. Head moderately prominent, especially in the male; eyes bulging; pronotum but little (male) or considerably (female) expanding posteriorly. Tegmina of male about one-half as long as abdomen, of female a little longer, acuminate ; the dorsal angles, toge.ther with the dorsal edges of pronotum and a light streak running backward from uj^per posterior edge of eyes forms a continuous line of light color to tip of tegmina on each side. The metapleurae are furnished with oblique yellow lines extending from back edge of pronotum to base of hind femora. Cerci of male on basal half rather heavy, apical half slender, bowed inward. Space between metasternal lobes as broad as long.
Length: of body, c? 15-18 mm, ? 25 mm; of pronotum, d^ 4-4,5 mm, ? 6 'mm; of tegmina, cf 6.5-7 mm, 9 11 mm, (sometimes complete, when they are 20 mm); of hind femora, d" 8.5-11 mm, ? 18-14 mm.
Fig. 43. — DichropJus vittatus.
female.
Fig. 44. — Dichroplus vittatus, male aud tip of abdomen.
This insect occurs in moderate numbers in the provinces of Santa Fe, Cordoba, San Louis, and Mendosa, usually frequenting the edges of groves where it feeds upon the more succulent vegetation. An occasional female specimen is to be found in which the wings are fully developed. (Collections of F. Schulz, H. Stempelmann, and O. Thomas). D. aiiioenas Stal. Cordoba (F. Schulz).
79 GENUS SCOTUSSA, GIGLIO-TOS.
S. iiniiKdica Giglio-Tos. Resistencia, Cliaco (Giglio-Tos) ; Rosario, Santa Fe (H. Stempelmann) ; Carcarana, Santa Fe (O. Thomas).
GENUS SCOPAS, GIGLIO-TOS.
S. obesus Giglio-Tos. Although no definite record exists, so far as the writer knows, of this insect having been collected in Argentina, there is but little doubt that it occurs in the territories of Formosa and Chaco.
Fig. 45. — Pdradieliroplus Brunneri, Fig. 4(5. — P. Brunneri, male, aud female. tip of abdomen.
GENUS PAKADIOHROPLUS, BRUNNER.
TABLE FOR SEPARATING THE SPP:CrES.
A. Hind tibiae provided wlth^nine spines in outer row. b. General color yellowish, the dorsum of pronotuni and al)domen dusky. Head black. bilobiis Giglio-Tos.
bb. General color greenish-olivaceous, the dorsum of ])ronotum and abdomen lights Head concolorous. 15ruuiiori Giglio-Tos. AA. Hind tibiti? pi'ovided with eight spines in outer row. b. Moderately robust, the head large. General coloi- ferruginous, irregularly and obsoleteljf variegated with greenish-fuscous. l>il)Uiu*tatus (iiglio-Tos.
1)1). More slender, fusiform, the head not large. ( icucral color Itrownish-olivaceous. I'li.silbrmis Giglio-Tos.
P. bi/<>l)i(s Giglio-Tos. San Lorenzo, Jujuy (Giglio-Tos). P. Briomeri G\9:Uo-Tos. Cordoba (F. Scliulz) ; Carcarana (O. Thomas) ; Resistencia, Chaco (Giglio-Tos). P. bi[>t(iict((tns Giglio-Tos. San Lorenzo, Jujuy (Giglio- Tos).
P.I fiisifonn/s Giglio-Tos. San Lorenzo, Jujuy (Giglio- Tos.)'.
80 GENUS OSMILIA, STAL.
TABLE FOR SEPARATING THE SPECIES. A. Largei". Base of wings light-blnish. violacea Tbimb. AA. Smaller. Base of wings sordid yellowish-hyaline. obliqua Thunb.
0. violacea (Thunb.) San Lorenzo, Jujuy (Giglio-To.s) ; Chaco, Tucuman (Bruner).
0. obliqua Thunb.) San Lorenzo, Jujuy (Gigiio-Tos).
Bruner, Lawrence. 1900. "The second report of the Merchants' Locust Investigation Commission of Buenos Aires." The second report of the Merchants' Locust Investigation Commission of Buenos Aires 1–80. View This Item Online: https://www.biodiversitylibrary.org/item/39801 Permalink: https://www.biodiversitylibrary.org/partpdf/168262 Holding Institution Smithsonian Libraries and Archives Sponsored by Smithsonian Copyright & Reuse Copyright Status: NOT_IN_COPYRIGHT This document was created from content at the Biodiversity Heritage Library, the world's largest open access digital library for biodiversity literature and archives. Visit BHL at https://www.biodiversitylibrary.org.
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