Orthopteroid Insects of Philippine Islands 1 1 



cc. Head greatly elongated. (Body apterous or subapterous, phas- 



mid-like. ) Proscopiidae. 



bb. Antennae of one or both sexes always longer than the anterior 

 femora. 

 c. Presternum unarmed or smooth, but little if at all swollen. 

 (Some Tryxaline genera, in which case the hind tibiae are 

 many-spined — 12 or more.) 

 d. Fastigium of the vertex horizontally produced or ascending, 

 usually joining the front in a distinct angle. Face decid- 

 edly oblique or retreating. Wings generally hyaline or 



vitreous Tryxalidae. 



dd. Fastigium of the vertex more or less depressed, joining the 

 front in a more or less rounded curve. Face nearly or 

 quite vertical. Base and disk of wings as a rule colored, 

 yellow, red or blue, and provided beyond with a fuliginous 

 or fuscous transverse band. 

 e. Outer margin of hind tibiae not provided with an apical 

 spine. 

 /. Ocelli situated close to the eyes. (Oedipodidae.) 



Locustidae. 



//. Ocelli remote from the eyes Thrinchidae. 



ee. Outer margin of the hind tibiae furnished with an apical 



spine Eremobiidae. 



cc. Presternum transversely swollen or strumose, laminately elevated 

 in front, or distinctly ridged or spined between the base of 

 the anterior legs. In these insects the hind tibiae are pro- 

 vided with less than 12 spines. 

 d. Vertex very wide, deeply sulcate and bordered by rather 

 prominent carinae, the fastigium declivent and its sulcation 

 continuous with that of the frontal costa. Face perpen- 

 dicular. Eyes prominent, globose, substylated ; ocelli sit- 

 uated between the eyes, posterior margin of the pronotum 

 more or less denticulate or tuberculate. . .Ommexechidae. 

 dd. Vertex less wide, variable,, often very narrow. Eyes oblong 

 and moderately convex ; ocelli usually more removed from 

 the front margin of the eyes. Posterior margin of the 

 pronotum without denticles or tuljercles. 

 e. Foveolae of the vertex above. 



/. Foveolae contiguous, forming the apex of the fastigium 

 of the vertex, which is more or less ascending. Front 



strongly oblique Pyrgomorphidae. 



//. Foveolae not contiguous, open behind. Vertex decli- 

 • vant, more or less angulate. Front perpendicular. 



Pamphagidae. 



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