42 Annals of the Carnegie Museum. 



Length of body, cf, 20 mm.; of pronotum, 7 mm.; of tegmina, 

 9 mm.; of hind femora, 12.5 mm. 



Habitat: The only specimen at hand, a mak, and the type of the 

 species, comes from Buena Vista, eastern Bolivia, where it was taken 

 by J. Stcinbach. C. M. Ace. No. 5573. 



Genus Prorachthes Gerstsecker. 



Prorachlhes Gerst^cker, Mitth. Ver. Neu-Vorpomm. u. Rtigen, XX, p. 38 (1889). 

 Prorachtes Giglio-Tos, Boll. Mus. Zoul. Anat. Comp. Torino, XIII, no. 311, p. 44 



(1898). 



The present genus was erected to receive a very peculiar elongate 

 cylindrical locust coming from Peru. 



81. Prorachthes insignis Gerstacker. 



Prorachlhes insignis Gerst.«cker, I. c, p. 40 (1889). 



A single male specimen of this remarkable locust is at hand. It 

 comes from the Rio Japacani of eastern Bolivia, where it was taken 

 in February 1917, by J. Steinbach. It bears no accession number, 

 but undoubtedly should be included in Ace. No. 5573. 



As Gerstaecker's description was based only on the female sex, a 

 few additional features possessed by the male may be noted here. 

 In this sex the vertex in front of the eyes is almost cylindrical, narrow- 

 ing but little towards the front, linearly grooved in the middle above 

 and below, with the frontal costa raised in the form of an elevated 

 wall, which is linearly sulcate from its middle to the base of the 

 clypeus. The latter has its basal middle triangularly set into the 

 front. The median ocellus is located just opposite the anterior 

 margin of the eyes, while the lateral ocelli are situated in front of the 

 middle of the eyes, and a very little in advance of them and appear as 

 small, smooth, rounded warts. The last ventral segment of the" male 

 abdomen is greatly elongate and dagger-like. 



Length of body, d^, 61 mm.; of vertex in front of the eyes, 7.5 mm.; 

 of pronotum, 6 mm.; of tegmina, 31 mm.; of hind femora, 20 mm.; 

 of last ventral segment of abdomen, 1 1 mm. The antennae of the 

 specimen are imperfect. 



Genus Leptysma Stal. 



Leplystna Sr.\L, Recens. Orth., I, pp. 42, 85 (1873); Bruner, Proc. U. S. Nat. 

 Mus., XXX, p. 657 (1906); Ib., Ann. Carnegie Mus., VIII, pp. 71 (1911), 478 

 (191,^)- 



