75 



tinued as a ferruginous patch to hind edge of pronotum. 

 Tegmina with the dorsal edges light veined, a few dusky 

 spots above ; the disk more or less mottled with black, as 

 is also the costal field, though to a much less degree. Pos- 

 terior femora very heavy, with a basal, middle, and preapical 

 dusky i^atch above; knees black both inside and outside. 

 Cerci of male rather heavy, straight, and somew^hat spatulate 

 apically. Last ventral segment of male abdomen obtusely 

 conical. Prosternal spine hort, conical, obtuse. 



Length : of body, d^ 23-26 mm, ? 28 mm ; of pronotum, 

 c? 5 mm, 9 6 mm; of tegmina, c? 1^^ mm, 9 18-22 mm; of 

 hind femora, 13 S" mm, 9 14-16 mm. 



This insect is quite robust and reminds one not a little of 

 the common North American Jle/otoiihis hirittofKs in its gen- 

 eral ajDjDearance. It occurs quite abundantly on the open 

 camp in the provinces of Santa Pe and Buenos Aires where 

 vegetation is rank. It has been reported as sometimes doing- 

 considerable damage to the grasses. (Collections of O. 

 Thomas and A. Kurriger). 



Fig. 8(5. — Diclbioijiaaarrogans, male, 

 aud tip of abdomen. 



Fig. 37. — Dichroplus pratensis^ 

 male, and tip of abdomen. 



D. exi/is Giglio-Tos. San Lorenzo, Jujuy, Resistencia, 

 Chaco (Giglio-Tos). 



D. elonr/atiffi Giglio-Tos. Province of Tucuman (Giglio- 

 Tos) ; Cordoba (P. Schulz, H. Stempelmann) ; Carcarana, 

 Santa Fe (O. Thomas) ; Rosario (A. Kurriger). This insect 

 is one of the most abundant and widely dispersed species of 

 the genus in middle Argentina. 



