Xovember — December 1890.] 



PSYCHE. 



433 



and Daemanea are tar more Tryxaline 

 than any of the others, for the posterior 

 margin rapidly retreats from the very 

 tip, so that the lobe narrows perspicu- 

 ously. The features in which these two 

 genera stand apart from the others will 

 be seen in the following table of the 

 genera of this group, in which I iiave 

 placed all know^n to me. 



TABLE OF THE GENERA OF ACROLOPHITINAE. 



Body slender; vertex horizontal or ascend- 

 ing at apex, the tip bluntly pointed; frontal 

 costa extending to clypeus ; metazona above 

 transversely convex or tectiform or plane 

 with a median carina, never concave ; lower 

 posterior angle of lateral lobes of prothorax 

 subrectangnlate ; hind legs relatively long; 

 bind femora slender, elongate and com- 

 pressed ; hind tibiae with more than eight 

 spines in the outer row; hind tarsi less 

 than half as long as hind tibiae. 



Head as viewed laterally with distinctly 

 ascending vertex; fuce below fronto-ver- 

 tical process subperpendicular; metazona 

 distinctly elevated above the prozona, 

 tumid or crested; antennae more than 

 half as long as the tegmina. 



Metazona much longer than prozona' 

 with an elevated crest. Acrolophitus. 

 Metazona barely longer than pro- 

 zona, tumid, but with only a slight 



carina Acrocara. 



Head as viewed laterally with vertex 

 scarcely or not ascending; face below 

 fronto-vertical process distinctly though 

 not greatly declivent; metazona hardly 

 or not elevated above the prozona, rarely 

 tumid, never more than gently carinate ; 

 antennae less than half as long as the 

 tegmina. 



Antennae much longer than the 

 face ; lower margin of lateral lobes of 

 prothorax anteriorly excised , broad- 

 ly exposing the pleural plate. 



Antennae entirely filiform; dor- 

 sum of metazona raised at an 

 exceedingly small angle with 

 that of the prozona; anterior 

 margin of tegmina shouldered 

 but not distinctly lobed near the 

 base ; last hind tarsal joint hard- 

 ly more than half as long as the 

 other two together. 



Pedioscirtetes. 

 Antennae with the joints of the 

 basal third depressed and slight- 

 ly broader than beyond; dorsum 

 of prozona and metazona in 

 same plane: anterior margin of 

 tegmina distinctly lobed near the 

 base; last hind tarsal joint (at 

 least in Machaerocerd) longer 

 than the other two joints to- 

 gether. 



Fastigium of vertex longi- 

 tudinally sulcate with no 

 median carina ; median car- 

 ina of pronotum subobsolete 

 between the sulci of the pro- 

 zona; posterior margin of 

 lateral lobes not produced 

 posteriorly at its extremity ; 

 axillary vein of tegmina free ; 

 ulnar vein normal. 



Machaerocera. 

 Fastigium of vertex 

 transversely tumid with 

 a distinct median carina in 

 addition ; median carina of 

 pronotum equally distinct 

 throughout; posterior mar- 

 gin of lateral lobes produced 

 posteriorly at the extremity 

 into a slight rounded lobe ; 

 axillary vein of tegmina im- 

 pinging on the anal at the 

 end of the basal third of the 

 wing; ulnar vein approach- 

 ing the median. . .Pe/'MZ'/rt. 



Antennae shorter than the face ; lower 

 margin of lateral lobes of prothorax 



