29 



DidiroiiiorplKi vli'idix found so abundantly throughout the 

 United States and portions of Mexico. The following de- 

 scription is therefore ajjpended : 



Antennae rather short with the joints somewhat depressed 

 basally; fastigium of the vertex projecting in advance of 

 the eyes about half their lesser diameter ; the frontal costa 

 gently sulcate from between antennae to clypeus ; lateral 

 carinae of face not prominent, sinuate, and diverging to 

 corners of face ; eyes small, rounded behind, nearly straight 

 in front and somewnat acuminate above; loveolae of vertex 

 but gently sulcate. Pronotum very gently comjDressed on 

 the sides, the lateral lobes slightly bulging; the three 

 carinae distinct, the lateral ones gently diverging from 

 anterior margin to the posterior : last transverse incision a 

 little behind the middle, jDOsterior edge partly angulate; 

 tegmina and wings va.rying in length from two-thirds that 

 of the abdomen to considerably surpassing it, their apex 

 rounded. Posterior femora moderately heavy, compara- 

 tively short, and but little surpassing the tip of abdomen. 

 General color either green or dull wood brown, with indica- 

 tions of a slight dusky band on sides of head, back of eyes 

 and upper portion of lateral lobes of pronotum; also a slight 

 blackish line on upper edge of knees of hind femora. There 

 is also an indication of dusky markings at the sides of basal 

 segments of abdomen and meso-and metathorax. 



Length: of body (female) 2o mm; antennae 5mm; of 

 pronotum 4 mm; of tegmina lU to 15 mm; of posterior 

 femora 10.5 to 11 mm. 



This insect is rather rare in the vicinity of Carcarana and 

 Roldan where it occurs along railroad tracks and in the vi- 

 cinity of cultivated or disturbed ground in a similar manner 

 to that of our North American form. Sjiecimens were also 

 seen from Rosario, Santa Fe. 



Dr. Giglio-Tos in his report on the Orthoptera of the 

 Bolivian Chaco and of the Rei^ublic of Argentina mentions 

 having taken sj:)ecimens of D. virklix Scudd. at San Lorenzo 

 in the province of Jujuy. Whether or not they were of the 

 same sj^ecies as the present I cannot say. 



