156 MEMOIRS ON THE COLEOPTERA 



narrower than the elytra, thence strongly tapering, with just visibly 

 arcuate sides, through the fifth tergite, which at apex is three-fifths as 

 wide as the first, one-half longer than the fourth. Length 1.6 mm.; 

 width 0.36 mm. California (Paraiso Hot Springs, Monterey Co.). 



Distinguishable very readily by the strongly fusiform outline, 

 anteriorly narrowed prothorax, rather heavy antennae and other 

 habital features. 



Moluciba n. gen. 



The species for which this generic name is proposed is of re- 

 markably distinct appearance among the allies of Acrotona. The 

 prothorax and elytra are both very greatly developed, the cephalic 

 carinae distinct and entire, the middle coxae narrowly but clearly 

 separated, the mesosternal process becoming very slender, greatly 

 prolonged and aciculate almost to their posterior limits, where its 

 very free tip is separated from the moderate triangular metasternal 

 projection, which is almost as long as wide, with its apex narrowly 

 rounded, by a very short interval as in Coprothassa, and, as in 

 that genus, to which however there is absolutely no suggestion as 

 to similarity in habitus, the elytral apices are rather deeply sinuate 

 externally. The type may be described as follows: 



Moluciba grandipennis n. sp. Rather large and stout, but feebly 

 convex, pale piceous-brown, the head and the abdomen, except the apex 

 and the apices of the basal segments, blackish, the elytra not paler than 

 the prothorax, feebly infumate along the suture basally and broadly 

 postero-externally, the legs pale; head and pronotum shining, with fine 

 and well separated, rounded and slightly elevated punctures, the elytra 

 duller, with still finer and closer, feebly asperate punctures, the abdomen 

 dull, with very fine close punctures throughout, as in many Oxypodse; 

 pubescence fine, very short and dense on the elytra and abdomen; head 

 small, almost longer than wide, one-half as wide as the prothorax, the 

 eyes but slightly prominent, at almost one-half more than their own 

 length from the base, the tempora parallel and broadly rounded, a little 

 more prominent than the eyes; antenna? blackish, gradually testaceous 

 basally, rather long, slender basally, very gradually becoming notably 

 thick at apex, the second joint fully as long as the first but thinner, only 

 very little longer than the third, fourth sensibly longer than wide, four 

 to ten very evenly increasing in width, fifth as long as wide, tenth two- 

 fifths wider than long, the last pointed, rather longer than the two pre- 

 ceding; prothorax large, suborbicular, a third wider than long, the sides 

 rounded, gradually strongly converging anteriorly, widest behind the 

 middle, the base rounded, with the angles obtuse and blunt, the surface 

 with a large shallow rounded ante-scutellar impression; elytra very 

 large, as long as wide, but little wider just before the apex than at base, 



