REVISION OF ELEODIINI BLATSDELL. 159 



In all of the specimens examined the pudendal membrane passes 

 directly backAvard, and therefore immediately continuous with the 

 valvular membrane, there being no fornix laterally, the angle formed 

 is in the median line and corresponds to margin of the genital orifice. 



Ilahttat. — Island of Santa Margarita (collected by the Alba- 

 tross Expedition of 1888, collection of V. S. National Museum) ; 

 Lower California (El Taste, Gustav Beyer; San Francisquito, Coll. 

 Acad. Nat. Sciences of San Francisco). 



Number of specimens studied, 32; 22 from Santa Margarita Island, 

 and 10 from the mainland of Lower California. 



Type.— Cixt. No. 4169, U. S. National Museuui. 



Type-locality. — Santa Margarita Island, Lower California. 



Saliott type-characters. — Feebly shiniug. Thorax subquadrate, 

 sides broadly and evenly rounded, base slightly wider than the apex, 

 anterior angles subacute, posterior angles obtuse, disc sparsely and 

 finely punctate. Elytra widest at apical third: disc uioderately, 

 slightly depressed along the suture in the feuiale, ir'/tli f('</uhir dhtaht 

 series of fine punctures, the intervals very sparsely and minutely 

 punctulate (Linell). 



Diagnostic characters. — The species resembles somewhat E. otnissa 

 LeConte, from Avhich it can easily be separated by the armed anterior 

 femora and by the first joint of the anterior tarsi of the males being 

 clothed beneath with a tuft of golden pubescence. 



From suhnitens it is recognized by the shining integuments, snuilliv 

 size, and ovate form. 



From all other members of the subgenus by not having the two 

 basal joints of the anterior tarsi in the males with pubescent pads 

 beneath. 



All of the specimens that I have seen are quite homogeneous and 

 wdthout any tendency to muricate punctuation. LinelFs cotypes are 

 before me ; most of them are slightly brownish, ]3robably from slight 

 immaturity. 



A species found upon the mainland of the peninsula agrees in all 

 essential structural characters with the specimens from the island, and 

 I therefore consider them to be one and the same. Both have the 

 elytra widest behind the middle; the femoral teeth vary in both sexes, 

 sometimes acute and again obtuse in the males. In the pen'nixular 

 form the body is rather more convex and the elytral punctuation is 

 stronger and the striae more or less impressed, the intervals almost 

 feebly convex. The tarsal spinules are ferruginous in the insular 

 form and darker in those of the mainland. 



Specimens of the peninsular form, collected at San Francisquito, 

 and which were before the great disaster in the collection of the Cali- 

 fornia Academy of Sciences, were referred to gentilis by Doctor 



