The type and allotype are the only individuals of the species 

 which we have seen. 



Microcentrum philammon'^ new species (PI. XIX, figs. 7, 8 and 9.) 



Related to M. angustatum, lanceolatum, myrtifolium and 

 syntechnoides, but quite distinct from all these species. From 

 angustatum it differs in the somewhat larger size, in the non- 

 sulcate fastigium of the vertex, in the tympanal area of the right 

 tegmen being without a subhyaline, triangular field, in the ventro- 

 cephalic margin of the cephalic femora having spines distad, 

 and in the styles of the subgenital plate of the male being longer 

 than the incision of the plate, instead of short. From lanceolatum 

 the new species differs in the narrower fastigium of the vertex, 

 which is also non-sulcate, in the more compressed pronotum 

 which also has narrower lateral lobes, in the more attenuate teg- 

 mina, in the more distinctly nodulose character of the proximal 

 portion of the costal margin of the tcgmina, in the shorter stridu- 

 lating vein of the same, and in the disto-dorsal alxlominal seg- 

 ment being non-emarginate mesad. When compared with 

 myrtifolium the present insect differs in the more elongate, 

 compressed pronotum, narrower and more elongate tegmina, 

 more inflated caudal femora and more elongate cephalic and 

 median limbs. From syntechnoides the new species differs in 



" Abtlomcn shrivelled. 



'2 Exclusive of ovipositor. 



1' Philammon, son of Apollo and Chione, a celebrated singer. 



TRANS. AM. ENT. SOC, XXJV. 



