158 MEMOIRS ON THE COLEOPTERA 



evenly and rather strongly arcuate at the sides, the basal angles obtuse, 

 the median line feebly impressed basally and with a very feeble and 

 transversely oval ante-scutellar impression; elytra nearly parallel, 

 moderately transverse, at base not quite so wide as the middle of the 

 prothorax, the suture equal in length to the latter, the apices sinuate 

 laterally, the flanks extending posteriorly somewhat; abdomen parallel, 

 with nearly straight sides, as wide as the elytra, the fifth tergite (cf ) 

 barely as long as the fourth and with a very minute tubercle on the me- 

 dian line behind the centre, the sixth broadly rounded, becoming feebly 

 sinuate medially at tip, the edge very minutely serrulate; middle coxee 

 narrowly separated, the acute apex of the mesosternal process extending 

 behind their middle and very free, far above (viewed ventrally) the 

 surface of the large and acutely defined angulate metasternal projection 

 and separated therefrom by a rather short interval; hypomera moderately 

 inflexed, wholly visible from the sides; tarsi moderately short and slender, 

 the first four joints of the posterior subequal, the first very slightly 

 longest. Length 1.65 mm.; width 0.38 mm. Pennsylvania (Buena 

 Vista Spring, Franklin Co.). Under leaves of the forest in August of 

 a very dry season. 



Differs from lineatula very markedly in the coarsely asperate 

 sculpture of the elytra, somewhat smaller and less incrassate an- 

 tennse, much shorter, more transverse head and in many other 

 features; in fact it is not at all closely allied to lineatula though 

 assignable apparently to the same group of Sipalia. 



The following is here suggested as another subgenus of Sipalia, 

 though it may prove to have rather generic than subgeneric value: 



Subgenus Sonomota nov. 



Differs from Sipalia in its more developed elytra, shorter and 

 evenly obconic but more slender third antennal joint and in having 

 the metasternal projection between the middle coxse rather long, 

 convex and undefined by a fine beaded edge, the middle acetabula 

 being gradually formed and not sharply defined; the following is the 

 type and only known species: 



Sipalia (Sonomota) lippa n. sp. Parallel, rather convex, strongly 

 shining, testaceous, the head scarcely darker, the abdomen clouded 

 gradually with blackish posteriorly except at apex, the legs pale; punc- 

 tures fine, rather sparse, asperulate and moderately numerous on the 

 abdomen, where the micro-reticulation is notably large and polygonal 

 but not strong; pubescence moderately long, rather sparse; head slightly 

 wider than long, fully four-fifths as wide as the prothorax, gradually and 

 moderately swollen basally, the eyes slightly prominent, at about twice 

 their length from the base, obliquely elliptic, their facets separated 



