316 Coleox)terological Notices. 



plo througbout, fine but deep and rather dense ; antennae rather short, the 

 club broad and almost parallel, third joint short, scarcely as long as wide, 

 very slightly longer and wider than the fourth. Prothorax very slightly wider 

 than long ; sides rounded anteriorly, thence feebly convergent and nearly 

 straight to the broadly rounded basal angles ; basal pedunculiform lobe ex- 

 tremely short and broad, truncate ; apex transverse ; disk abruptly and very 

 deeply excavated throughout the length, the excavation but slightly longer 

 than wide, and three-fifths as wide as the entire prothorax ; punctures rather 

 fine bat deep and very dense throughout, simple and not in the least tubercu- 

 lous. Elijtra about two and one-half times as long as the prothorax and very 

 slightly wider ; sides subparallel, nearly straight, feebly arcuate near the 

 humeri which are narrowly rounded ; apex gradually, evenly rounded ; base 

 broadly, rather strongly emarginate ; disk very broadly, strongly concave 

 between the second discal costae throughout the length, the first costa feeble 

 and extending from the base for one-seventh or one-eighth the length, totally 

 obsohite elsewhere ; costae two to four well developed ; surface finely, very 

 densely punctate, the concavity having extremely indistinct unimpressed 

 series of very slightly larger punctures, the intervals between the lateral 

 ridges biseriately and rather finely punctate. Abdomen and metasternum 

 polished, rather coarsely, moderately densely and very distinctly punctate. 

 Legs moderate, the femora very robust. Length 2.8 mm. 



New Mexico (Las Vegas). Mr. H. Meeske. 



This small species belongs to the pusillus group and represents 

 an extreme development of its structural peculiarities ; it is very 

 much broader than laqueatus Lee. 



The three species of the j^^sillus group may be distinguished as 

 follows : — 



First elytral costa feeble but traceable behind the middle. 



Elytra gradually, rather strongly concave towai'd apex ; base strongly 

 emarginate ; pronotal punctuation simple throughout, without trace of 



elevated tubercles pusillUS 



Elytra not distinctly concave, just visibly sinuate at base; pronotal punc- 

 tures fine, situated on the summits of coarse feebly elevated tubercles. 



laqueatus 

 First elytral costa only visible near the base ; pronotal punctures simple. 



concavus 



Besides the more elongate and narrower form of pusillus, there 

 are many other characters distinguishing it from laqueatus. 



CERIXON Latr. 



C californicuui n. sp. — Elongate, sul)parallel, feebly convex, piceous, 

 polished, tlie upper surface with erect and rather long but extremely sparse 

 and inconspicuous hairs, growing from the punctures. Head transverse, feebly 



