Coleoplerological Notices, V. 353 



Rhode Island (Boston Neck). 



The description is drawn from the male, this sex having a small 

 but rather strong carina near the apex of the fifth dorsal segment, 

 and another, more feeble, near the apex of the sixth. 



There is a remarkable and isolated group of genera inhabiting 

 the northern beaches of the Pacific coast, having the elytra ex- 

 tremely short, the tibiae short, completely devoid of lateral spin- 

 ules, and clothed with long sparse erect hairs, the tarsi very short, 

 thick, 4-4-5-jointed, the first four of the posterior equal or with the 

 first just visibly longer than the second, the prothorax narrowed 

 toward base, with the hypomera feebly inflexed, and the labial palpi 

 two-jointed. They may be defined as follows : — 



Metasternum invisible except between the apices of the middle coxse, whicli 

 extend to or slightly upon the bases of the posterior ; labial palpi greatly 

 developed, the basal joint stout, cylindrical, more than twice as long as 

 the second and as long as the second maxillary ; integuments extremely 

 opaque and densel}' granulato-reticulate throughout. 

 Body broad, the abdomen inflated, with no segment at all impressed at 

 base, the metasternal side-pieces extending behind the elytra ; labrum 

 very strongly transverse, four times as wide as long, truncate ; mentum 

 strongly transverse, the apex transversely truncate and with an abrupt 

 shallow emargination occupying median third, with its bottom transverse; 

 ligula with a slender deflexed terminal process, the supports of the palpi 

 separated by a rather wide parallel intermediate piece ; mandibles serru- 

 late from the internal submedian tooth nearly to the apex ; infralateral 



carina partially obsolete LiparoceplialllS 



Body narrow, the abdomen not inflated although rather broader than the 

 anterior parts, the first three segments transversely impressed at base ; 

 metasternal side-pieces not extending behind the elytra ; labrnm smaller, 

 twice as wide as long, rounded ; mentum narrower, more rounded at apex, 

 with a small median emargination in circular arc; process of ligula not 

 visible in the types ; supports of the labial palpi very approximate, 

 separated by a slender acute process ; mandibles smaller, not serrulate 



within ; infralateral carina feeble but almost entire Diaillota 



Metasternum longer, the apices of the intermediate separated from the bases 



• of the posterior coxse by a conspicuous interval ; labial palpi long but much 



more slender, the basal joint slightly longer and only very slightly thicker 



than the second ; eyes extremely small, rudimentary ; integuments more 



finely sculptured but dull Alllblopiisa 



In these genera the middle coxae are contiguous and their aceta- 

 bula indefinitely limited behind ; in Liparocephalus and Diaulota the 



