438 



PSYCHE. 



|Ni)veniber — December 1S90. 



fuRcous, often with a greenish tinge, with the 

 basal half of the femora paler. 



Length of body {$) ^1-^ mm., (?) 35 

 mm. ; tip of head to tip of closed tegmina 36 

 mm. ; of tegmina ( (J) 27 mm., ( $ ) 29 mm ; 

 of hind femora ( (J ) 16.5 mm., ( $ ) 18 mm. ; 

 of antennae ((J) 21 mm., (?) 15 mm. 



Two $ . Montelovez, Cohahuila, 

 Mexico. September 20 (E. Palmer) ; 

 one 9? Lcrdo, Mexico, November (L. 

 Brimer) . 



The succeeding genus has a still more 

 Tryxaline appearance, due principally 

 to its more oblique face, which shows 

 on a side view but little concavity be- 

 low the fronto-vertical process. Wheth- 

 er it belongs in the tryxalidae or not, 

 its close alliance to the preceding forms 

 cannot be doubted. It has already been 

 described, but insufficiently, by Thom- 

 as, who placed it with the tryxalidae^ 

 and it is here recharacterized, 



PKDioscmrETES Thomas. 



Thomas wrote the name Pedioscer- 

 /^/e.9, but this is incorrect, as it is plainly 

 derived from o-Kipraw. 



Body slender, feebly fusiform. Head of 

 the same general form as in Acrocara, but 

 with the vertex nearly horizontal, the process 

 barely? ascendant, the process separated from 

 the vertex by a distinct but not deep trans- 

 verse arcuate sulcation striking the anterior 

 border of the eyes ; the vertex is gently con- 

 vex transversely, the process slightly tumid 

 above; frontal costa much as in Acrocara, 

 but with a shallower sulcus which terminates 

 above where the costa, over a brief space, be- 

 comes compressed to a thick lamina, and 

 with a broader and more regular divergence 

 at base; lateral carinae as in Acrocara, a^ 

 also the fastigia and lateral ocelli. Eyes 



small, not very prominent, about two thirds 

 as long as the infraocular portion of the 

 genae. Antennae (now broken in the only 

 specimen seen) said by Thomas to extend 

 "about one fourth their length beyond the 

 pronotum," linear, and cylindrical except 

 that six or seven joints beyond the second 

 are slightly depressed and shorter than the 

 succeeding punctate joints without gaining 

 noticeably in breadth. 



Pronotum tapering gently forward, moi-e 

 conspicuously on the metazoiia than on the 

 prozona, the former very slightly ascending 

 posteriorly, the dorsum of the prozona 

 broadly convex transversely, that of the 

 metazona nearly plane; median carina slight, 

 slightest on the prozona, subobsolete between 

 the sulci of the same, the two sulci of the 

 prozona faint but complete; hind margin of 

 metazona very obtusely angulate, the angle 

 rounded, the lateral carinae much as in Acro- 

 cara-^ lateral lobes much as therewith the 

 anterior border slightly sinuate ; metasternal 

 lobes almost as far apart in the 5 as the 

 mesosternal. Termina slender, subcoriaceous 

 on basal third only, where they are densely 

 reticulate, normally supplied with spurious 

 veins, the vena intercalata only indicated in 

 the middle of its normal course, the vena 

 media and vena discoidalis both furcate, the 

 vena axillaris impinging on the vena analis. 

 Radiate veinsof wings normal. Hind femora 

 longer than the abdomen; spurs and hind 

 tarsi as in Acrocara. 



Only a single species is known. P. 

 nevadensis Thorn., from Nevada, one 

 of the type-specimens of which has been 

 obligingly sent me for examination by 

 Dr. Riley. The wing is not well de- 

 scribed by Thomas, nor well figured by 

 Glover, and in the specimen seen is not 

 fully spread, so as to render a good de- 

 scription impossible in its present con- 

 dition. It may be said, however, that 

 the band is fusco-fuliginous, broader 



