174 Coleopterological Notices. 



developed palpi and correspondingly smaller, more robust and oval 

 antennal club; it was taken very abundantly at night in the suburbs 

 of Alameda, Cal., and is dedicated to an enthusiastic friend of ento- 

 mological science — Mr. W. G. W. Harford, of Oakland, Cal. 



DliVACOMA n. gen. (Melolonthini). 



Clypeus concave, parallel, subtruncate. Mentum moderate, subquadrate, 

 concave. Maxillse moderate, the palpi well developed ; first joint very small, 

 narrow, obconical ; second and third longer than wide, the former the longer, 

 both obconical and obliquely truncate ; fourth slightly shorter than the pre- 

 ceding three together, pointed, deeply impressed or excavated on its outer face. 

 Labial palpi very small ; third joint ovoidal, obtusely acuminate, as long as 

 the two preceding together. Labrum short, transverse, free, impressed in the 

 middle. Autennre ten-jointed ; middle joints of stem subanchylosed, short ; 

 club three-jointed, very long and arcuate in the males. Anterior coxse trans- 

 verse, but slightly prominent. Metasternal episterna moderate in width. 

 Abdominal segments connate, the sutures fine but not entirely obliterated, 

 rendered distinct by the disposition of the vestiture. Metasternum well 

 developed. Legs rather short and slender ; tarsi short, the posterior much 

 sliorter than the tibiae ; claws moderate, evenly and strongly arcuate, toothed 

 near the base, the teeth distinctly unequal. 



The above characters indicate a genus intermediate in many 

 characters between Polyphylla and Thyce. It is founded upon 

 Thyce marginata Casey (Bull. Cal. Acad. Sci., II, p. 39). The 

 deep excavation of the fourth palpal joint, which is present in this 

 genus in common with Thyce, is by no means confined to this 

 group of genera, as it is a common character in Diplotaxis, although 

 generally less developed. 



The characters agreeing with Thyce, reside in the structure of 

 the palpi and tarsal claws, and those which ally it most directly 

 with Polyphylla, are found in the greatly developed male antennal 

 club, and the short tarsi. 



TENEBRIONID.E. 

 EDROTES Lee. 



The four species of this genus may be separated as follows: — 



« 



Pubescence long and erect. 



Pubescence more condensed in several narrow widely distant lines on each 

 elytron ; surface highly polished, very minutely and sparsely punctate, 



