248 CALIFORNIA ACADEMY OF SCIENCES. 



specimens before me, all of which have it distinctly wider 

 than long. 



ACTIDIUM Matth. 



A. rotundicolle d. sp.— Rather robusi-, strongly convex, piceous-black; 

 legs and palpi pale flavo- testaceous; antennre pale testaceous at base, becom- 

 ing piceous-black at apex; pubescence fine, very short, not at all dense; 

 integuments shining, subalutaceous. Head much wider than long, rather 

 convex, very minutely and sparsely punctate; eyes moderate, rather prom- 

 inent, coarsely granulate; antennae as long as the head and prothorax 

 together; funicle slender; club robust; joints increasing in length and thick- 

 ness. Prothorax slightly wider than the head, about equal in length, two- 

 thirds wider than long; sides parallel and strongly, evenly arcuate; base 

 broadly arcuate, distinctly sinuate laterally; basal angles obsolete; apex 

 broadly truncate; disk broadly, evenly convex, very minutely reticulate or 

 subgranulose, minutely, evenly and sparsely punctate. Scutellum small, 

 equilatero-triangular, coarsely asperate. Elytra at base as wide as the pro- 

 thorax; sides parallel for two- thirds the length from the base, rather strongly, 

 evenly arcuate, thence feebly convergent, very feebly arcuate to the apex 

 which, conjointly, is rather abruptly truncate; exterior angles broadly 

 rounded, inner angles narrowly rounded; disk widest at nearly two-fifths 

 its length from the base, nearly one-half longer than wide, one-half longer 

 than the head and pronotum together, strongly cylindrically convex, minutely, 

 densely reticulate or subgranulose, shining, very minutely, evenly, rather 

 sparsely, subasperately punctate; punctures without definite arrangement. 

 Legs rather long, somewhat slender; posterior tibiae very slender toward 

 base; rapidly dilated, widest at the apical third, compressed; tarsi short, 

 very slender. Length 0.4 mm. 



Texas; (Galveston 2). 



This species differs from those previously described from 

 California in the sculpture which is much more feeble, and 

 in the form of the prothorax. It is as robust as vobustuluni 

 and does not appear to possess many characters in common 

 with the three species described by Mr. Matthews. 



PTILIUM Erichs. 



P. sulcatum «• sp. — Rather slender and convex; sides nearly parallel; 

 color pale brownish-testaceous, antennae and legs slightly paler, more flavate; 

 integuments coarsely sculptured, shining; pubescence fine, subrecumbent, 

 not very dense. Head moderate in size, much wider than long, triangular; 

 surface moderately convex, rather coarsely, irregularly and feebly tubercu- 



