70 



D. arrogant St&l. Buenos Aires, Monte Video (C. Stal); 

 LaColina, Buenos Aires and Bahia Blanca (Bruner). 



This insect was reported as a common destructive species 

 in portions of the provinces of Buenos Aires and Bahia 

 Blanca; and possibly also from Rio Negro and Pampa 

 Central where rather small "tucuras" frequently destroy 

 the "camp." 



I). puHctulatui^ Thunb. This seems to be the smallest, 

 most variable and at the same time most widely distributed 

 species of the genus. Specimens were examined from all 

 parts of the Republic north of the Rio Negro of Patagonia. 



Fig m. — Dichropln^ I Fig. AO.—Dichrop In s 



honqatus. male, and tip Fig. 3!).-Z>. j^i^^'C- p >' nctulatus, mala, 

 of abdomen. tulatns. tVmale. and tip of abdomen. 



Fig. il.—Dichroplus coaspersus, female. Fig. 42.— D. arroga7is, female 



Dichroplus conspersus n. sp. 



A moderately small but very robust species, of a duskv 

 color, in which the hind tibiae are greenish yellow, the lower 

 sulci and inner basal half of posterior femora bright red, 

 and the interspace between the mesoternal lobes a little 

 wider than long. 



Head small ; pronotum greatly expanding posteriorly, the 

 median carina obliterated on middle lobes, moderately plain 

 on anterior and posterior lobes, severed by all three trans- 

 verse sulci, the last a little in advance of the middle ; the 

 posterior lobe a little the longest, right-angled in male, a 



