432 



PSYCHE. 



[November — December 1890. 



resting place, until their comparative 

 examination, after a general survey had 

 been completed, showed me that they 

 possessed features in common vsdiich 

 warranted their being grouped together 

 and placed as a whole in the ocdlpodi- 

 dae^i although several of them present 

 marked Tryxaline features. I liad con- 

 cluded to regard them as a distinct 

 subfamily of oedipodidac, when I 

 dicovered that one of them, the 

 genus Hippacris., described by me 

 many years ago* from Peru as an excep- 

 tional form of tryxali'dae, was very 

 closely related indeed to vSaussure's 

 Daemonea^i so much so that tlie latter 

 genus also would have to be placed in 

 the same category ; this separate treat- 

 ment, but under the name of a stirps, I 

 believe Daemonea and Hippacris would 

 have received at vSaussure's hands, had 

 he possessed a specimen of the latter ; 

 and to this assemblage of fc^rms I pro- 

 pose to give the subfamily name of 



ACROLOPHITINAE. 



The distinguishing characteristic of the 

 meinbers of this group among oedipodidae is 

 that the front and vertex conspire to form an 

 advancing process, sometimes also ascending, 

 in the upper front of the head, much as in 

 Colpolopha among acrididae, and in many 

 phymatidae. and of course reminding us of 

 tryxalidae\ but in such other characteristics 

 of structure as would be regarded as more 

 commonly found in the tiyxalidae than in 

 the oedipodidae, they almost invariably in- 

 cline to the latter group; and where any one 

 of them shows a Tryxaline feature (besides 

 the fronto-vertical process) in any marked 



*Proc. Bost. sioc. iKit. hist., 1S7S, v. 17, p. 267. 



degree, it is almost sure to be offset bv some 

 other more striking Oedipodine features and 

 often by a combination of several As a 

 general rule, the face is almost perpendicular 

 below the fronto-vertical process, which with 

 the process causes the upper portion to be 

 more or less concave. The eyes, except in 

 Peruvia and especially in Gymnes. are re- 

 markably small, generally very much shorter 

 than the infraocular portion of the genae ; the 

 antennae are linear or faintly ensiform and 

 usually depressed on the basal joints; the 

 metazona is always soinewhat though rarelv 

 much longer than the prozona, with the pos- 

 terior piocess subrectangulate or broadly 

 rounded, generally with a slight median car- 

 ina running through the whole pronotum, 

 but crested on the metazona in Acrolophitus, . 

 and almost absolutely absent in the genera 

 at the other end of the series; the prozona 

 traversed by a pair of faintly incised continu- 

 ous transverse sulci, the hinder never con- 

 fused with the typical sulcus separating the 

 prozona and metazona; lateral lobes of the 

 pronotum with the anterior and posterior 

 margins parallel or subparallel, except in 

 Hippacris (and Daeynoneaf) ; the mediasti- 

 nal and scajiular areas in the basal half of the 

 tegmina more or less, sometimes very, irreg- 

 ularly reticulate, never with simple trans- 

 verse parallel veins; the vena intercalata 

 generally obscure, sometimes wanting, the 

 vena axillaris sometimes free, sometimes im- 

 pinging on the anal vein ; metasternal lobes 

 distant (except in Peruvia). 



There is no doubt that Hippacris 

 and Daemonea are widely separated 

 from the others and that fully to justify 

 their collocation in this manner inter- 

 mediate types should be found ; these 

 are t6 be sought in the western tropics 

 of America. It should not, however, 

 be overlooked that in the form of the 

 lateral lobes of the pronotum Hippacrl 



