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III, Undescribed Genera and. Species hclonging to the 

 Bhynchotal Family Pentatomidse. By W. L. Distant. 



[Read March 7th, 1900.] 



Plate II. 



With three exceptions the type specimens of all the 

 genera and species here described are to be found in the 

 British Museum ; and with two exceptions they are all 

 represented in that collection. Much — perhaps over- 

 mucli — is often said as to the number of genera proposed 

 in the Family Pentatomida?, but this opinion usually 

 subsides when a knowledge of that family as a ivliole is 

 acquired. Compared with any well- worked group of other 

 insects — such as the Longicornia in Coleoptera, the generic 

 subdivision will not be found excessive. 



PENTATOMIDiE. 

 SubfamHy DISCOCEPRALIN^. 

 Trincavellius, gen. nov. 

 Body broad, ovate, more than half as broad as long. Head large, 

 broad, rounded in front, very distinctly and bluntly toothed in front 

 of eyes, beyond which it is moderately concavely sinuate ; lobes 

 about equal in length. Eostrum reaching tlie basal segment of the 

 abdomen, second joint longest. Antenn* tive-jointed, first joint 

 short — not nearly reaching apex of head, second a little longer 

 or subequal in length to third, fifth short slightly incrassated. 

 Pronotum much wider than broad, the lateral areas laminately de- 

 veloped, their margins roimded and somewhat erosed, posterior 

 margin truncate at base of scutellum. Scutellum long, reaching the 

 base of the last abdominal segment, subtriangular, moderately 

 gibbous at base, the apex truncate. C(jrium broad, the lateral 

 margin convexly rounded, distinctly but obtusely angulated a little 

 beyond base ; apical margin rounded ; membrane very small, not 

 reaching apex of abdomen. 



This genus, which to my knowledge has no special 

 affinity with any other, I have placed near Discocephala.. 

 trans. EXT. SOC. LOND. 1900. — PAIiT I. (APRIL) 



