72 PROCEEDINGS OF THE ACADEMY OF [Feb., 



Compared with a male of A. oligoneura (Haan) before us, the 

 present male is seen to differ widely in its smaller size, decidedly 

 shorter and heavier pronotum with supra-coxal expansion more 

 decided, much shorter tegmina and wings with distal margins showing 

 no truncation, suffused tegmina with cross- veinlets very much 

 more numerous and irregular and differently colored wings with 

 apex of anterior field not distinctly truncate. 



The position of the present species in the genus Acromantis is 

 somewhat difficult to assign, due to the fact that the male sex of 

 A. australis Saussure and the female sex qf luzonica are unknown. 

 The heavy pronotum and colored wings lead us to believe it to be 

 more closely related to the group including australis than to that 

 including the more slender species such as oligoneura. It is very 

 possible that it represents a distinct group, in certain features an- 

 nectant between these, but further material is needed before this 

 can be definitely stated. From comparison with the male of A. 

 hesione Stal before us, it is clear that the present species is widely 

 separated from that insect, which is clearly the nearest approach 

 among the species of the australis type toward those of the oli- 

 goneura type. 



Type. — cf ; Baguio, Benguet, Island of Luzon, Philippine Islands. 

 (From C. F. Baker.) [Hebard Collection Type No. 528.] 



Size small and form robust for the genus. Head with supra- 

 ocellar spine subobsolete, represented by a mere rounded node 

 mesad on the transverse carina there formed. Occiput with lateral 

 vertical sulcations alone distinct, the two mesad indicated only as 

 shallow, broad, brief depressions below the summit, summit of 

 occiput not raised above the eyes, nearly transverse, very weakly 

 and broadly concave mesad and very weakly and broadly convex 

 from lateral sulci to eyes. Ocelli not large, distinctly smaller than 

 in this sex of oligoneura and not as closely placed, arranged in a 

 triangle slightly wider than high. Pronotum strikingly heavy for 

 the size of the insect, the few blunt teeth on lateral margins of shaft 

 and neck heavy, distinctly heavier than those of oligoneura; supra- 

 coxal expansion decided, margins smooth, forming a rounded angu- 

 lation meso-cephalad, as in oligoneura. Tegmina short, not extend- 

 ing beyond apex of abdomen, entirely subopaque, in all fields thickly 

 supplied with a network of minute irregular veinlets; marginal field 

 broad, narrowing gradually to near apex of tegmina; the four ob- 

 Uque veins of the discoidal field straight, not curved at their bases; 

 the apices of the tegmina moderately broadly rounded, but with 



