ACRIDID^. 519 



to each other ; fore border and sides straight, the latter oblique ; hind border 

 rounded, slightly elevated. Apical valves of the abdomen broad, obliquely 

 ascending. Cerci lanceolate, short. Legs unarmed, except the hind tibiae, 

 which have two rows of black-tipped spines ; fore femora and hind femora 

 dilated beneath at the tips. Foie wings broad, with a few brown pustules; 

 areolets irregular ; costa convex, slightly excavated near the tip ; hind border 

 much rounded. Hind wings cinereous, hyaline, much shorter than the 

 fore wings; veins pale; areolets mostly irregular. Length of the body 

 13| lines; expansion of the fore wings 19 lines. 



The narrower fore part of the head, the antennae not dilated, and 

 the narrower and much less truncated fore wings distinguish it from 

 T. punctata. 



a. Philippine Isles. From Mr. Cuming's collection. 



3. Trigonoptertx platypteba. 



Acridium (Trigonapteryx) platypterum, Haan, Verz. Nat. Gesch. Ned. Ind. 

 Bez. Ins. 151, pi. 23, f. 6. 



Cape?? 



This species and T. ohliqua may be identical, but in the figure of the 

 former the fore wings are represented as much less excavated than those of 

 the latter. 



4. Trigonopteeyx Hopei. 



Hopei, Westw. Arc, Ent. 



China. 



5. Trigonopteryx obliqua. 



Mas. Viridis; vertex antice conicus, subsulcatus ; antennce lanceolatw, 

 non dilatatcE ; pedes breviusculi, femoribus anticis et posticis subtiis 

 basi dilatatis, tibiuque iarsisque quatuor anterioribus nigricante 

 fasciatis ; pedes breviusculi, femoribus anticis et posticis subtus apice 

 dilatatis, tibiis tarsisque quatuor anterioribus nigricante fasciatis, 

 tibiis posticis biserialim spinosis ; aim anticcB latte, pustulis nonnullis 

 lineaqite obliqua fusca, costa convexa apicem versus excavata, margins 

 postico valde rotundato ; alcB posticce cinerece, diaphance, breviores. 



Male. Green, slender. Head and prothorax thickly and minutely 

 punctured. Head slightly ascending; vertex in front flat, conical, slightly 

 furrowed near the fore border; front very oblique, keeled where it joins the 

 vertex. Eyes fusiform, prominent. Antennae lanceolate, much longer than 

 the prothorax, which and the abdomen are like those of T. Philippensis in 

 structure. Legs rather short; fore femora and hind femora dilated beneath 

 at the lips; four anterior tibiae and tarsi with blackish bands; hind tibiae 

 with two rows of black-tipped spines. Fore wings broad, with some brown 

 pustules and with an oblique brown line, which extends from one-third of 

 the length of the costa towards the end of the interior border; costa 

 rounded, somewhat excavated towards the lip; exterior border much 

 rounded. Hind wings cinereous, hyaline, much shorter than the fore 

 wings; veins pale. Length of the body 12 lines; expansion of the fore 

 wings 29 lines. 



