632 The Philippine Journal of Science 1923 



t\ Rostrum dorsally flat, only with a more or less strongly 



indicated medial longitudinal groove. Inner edge of hind 



tibiae with a number of obtuse toothlike projections; first 



and second abdominal sternites connate. 



f. Prothorax with dimplelike depressions dorsolateral^, 



elytra at apex forming a mammillary projection; hind 



femora, in both sexes, not nearly reaching to apex of 



elytra Eumacrocyrtus Schultze. 



• f. Prothorax without dimplelike depressions, elytra not form- 



ing a mammillary projection apically. 



Macrocyrtus Heller. 



f. Rostrum with a broad longitudinal depression, hind femora 



reaching distinctly beyond apex of elytra, hind tibiae at 



most with some fine thorns Nothapocyrtus Heller. 



h\ Hind femora beset with a sharp thorn on underside before 

 apex, fore coxae touching each other. 88 

 er. Rostrum with distinct basal cross groove. 

 k 1 . Rostrum in apical part transversely humplike swollen, eyes promi- 

 nently bulging, at upper margin with a groove, scape short, not 



nearly reaching hind margin of eye Apocyrtidius Heller. 



k\ Rostrum in apical part not swollen, eyes not prominently bulging, 

 scape at least reaching to hind margin of eye. 



Metapocyrtus Heller. 

 P. Rostrum as long as broad, squarish or trapezoidal, the lateral mar- 

 gins set off at right angles, dorsally lengthwise arched and sep- 

 arated by a prominent cross groove from curved front. 



Subg. Artapocyrtus Heller. 

 P. Rostrum longer than broad. 

 m\ Dorsolateral edge of rostrum acute, at base falling off at right 



n\ Rostrum dorsally curved lengthwise, moderately densely punc- 

 tured, without any trace of longitudinal ridges, the anterior 

 margin of prothorax raised and becoming broader latero- 

 ventrally. 

 o 1 . Prothorax punctured, with distinct anterior submarginal 

 groove, prosternum slightly emarginate. 



Subg. Sphenomorphoidea Heller. 

 o\ Prothorax granulate, anterior submarginal groove dorsally 

 entirely obliterated, the anterior margin laterally becoming 

 broader and ventrally distinctly emarginate. 



Subg. Sclerocyrtus Heller. 



' Tb- : 



; Apocyrtus which by their characters may lead 



to this place in the key, must, on account of the visible mandib . .... 

 be placed among the Scythropines; they belong to the genus Isoptera 

 Faust, Ent. Zeitg. Stett. (1895) 56, 4— Translation of Heller's foot- 

 note m Philip. Journ. Sci. § D 7 (1912) 302. 



