AMERICAN COMPONENTS OF THE TENTYRIIN^ 37 1 



and transversely truncate, the lower small and more pointed. 

 The epistomal lobe is squarely truncate, with converging sides. 

 The eyes are large, prominent, subentire and coarsely faceted, 

 with the supra-orbital carina much finer and feebler than usual, 

 the prothorax narrower than the elytra, the latter having the 

 humeri exposed at base, and the basal joint of the hind tarsi is 

 unusually elongate, being four-fifths as long as the entire 

 remainder. The legs are rather long and slender. The two 

 species known thus far may be outlined as follows : — 



Form oblong-oval, shining, castaneous ; head broadly oval, the man- 

 dibles and clypeus coarsely and densely punctured, the vertex and 

 occiput much more sparsely ; prothorax nearly twice as wide as 

 long, the apex feebly emarginate, the anterior angles acute and 

 very slightly everted, the base broadly rounded at the middle, 

 feebly sinuate at each side, the hind angles subacute but not 

 prominent, the sides moderately arcuate and slightly divergent to 

 base; elytra slightly broader at base than the prothorax, elongate- 

 oval, the sides moderately arcuate, the humeri distinct, the surface 

 moderately convex, sparsely punctured, the punctures feebly seri- 

 ately arranged, becoming slightly muricate and dense at the sides 

 and apex ; epipleuraj entire ; mesosternum coarsely and densely 

 punctured ; metasternum moderately long at middle, very sparsely 

 punctured, the sides and parapleural very densely ; abdomen 

 sparsely punctured, the femora coarsely but sparsely. Length 6.5 

 mm. California helopioides Horn 



Form elongate-oval, strongly convex and shining, black or piceous- 

 black, the under surface and legs more or less dark piceo-rufous ; 

 head rounded, nearly as long as w'ide, not coarsely but strongly, 

 moderately closely and evenly punctate, the punctures somewhat 

 elongate, finer but scarcely sparser on the occiput ; antennae nearly 

 two-fifths as long as the body ; prothorax three-fourths wider than 

 long, the apex and base equal in width, the former evenly sinuate 

 between the finely acute and anteriorly prominent angles, the latter 

 lobed in the middle and thence feebly sinuate to the angles, which 

 are obtuse but not at all rounded, the sides broadly and moderately 

 arcuate at the middle, converging and straighter toward base and 

 apex, not sinuate behind the apical angles which are not everted ; 

 disk widest at the middle, with rather small and sparse pvmctures, 

 becoming somewhat rapidly coarse and very dense but scarcely at 

 all confluent in lateral fifth or less, the surface feeblv impressed 

 before the basal lobe and with a fine and very short impressed 

 longitudinal line near the basal margin ; scutellum well developed, 

 flat, nearly as long as wide, evenly and circularly rounded behind 

 and projecting behind the basal margin; elvtra elongate-oval, 

 between three and four times as long as the prothorax, and, some- 

 what behind the middle, fully a third wider, the sides broadly 



