Classification of the Coleopterous fanuUj EndonojcJiidae. 45 



the gn^atcst ease in this genus by the gj'eat tlili'eieiice in 

 the temiinal part of the abdomen, tlie males having a 

 rather long and more or less asymmetrical sixth segment, 

 often exposing on the left side a slender chitinous ramus 

 of the aedeagus. 



The description and figure of E. sallaei Gorh., are of the 

 male and not the female as supposed, and the dilated 

 elytra may be a male characteristic. There is no tooth 

 to the front tibia in this sex, but all the tibiae are curved 

 and rather clavate. 



The two specimens supposed by Gorham to be male and 

 female of E. subcostatus Gorh., are both males, and that 

 described as the female of E. brunneus Gorh., may be that 

 of E. subcostatus, but the ty])e specimen of E. brunneus 

 is identical with the earlier-described E. molUcormcs 

 Gorh., the original specimens of which are very immature. 



The specimens referred by him to E. rufitarsis Chevr., in- 

 clude E . fuliginosus Guer., and, judging by the considerable 

 diJ\"erences in the aedeagi of the males, several other species 

 as well, but more adecpiate series are necessary to enable 

 these to be satisfactorily described. 



The Mexican specimens referred to E. unicolor Horn, 

 belong to a new species, which Hiay be called 



Epipocus parvus, s]). n. 



FlavuH, antemiaruni articnilis C'-IO'^ bruiuicscentibus, paulo 

 nitidus, hand dense puuctatiis, sat sparse liaud minute pubcscens; 

 pronoto valde transverso, lateiibus antice foititer cuivatis et con- 

 tractis, fovcis basalibus profundis et angustis, antice sat late fos- 

 sulatis; elytris convexLs, longe cordiforniibus : 



J, elytris apice oblique trluicatis, tibia antiea iutus dentata : 



V, elytris baud truncatis. 



Long. 5"5 mm. 



Hab. Mexico : N. Sonora {Morrison). 



This diilers from the N. American E. unicolor in being 

 rather smaller, lighter coloured, more shining and clothed 

 with longer hair. The pronotum is much more narrowed 

 in front and the antennae are much more slender. 



Genus Anidrytus. 

 I can find no difference between specimens iu the British 

 Museum labelled as types of Anidrytus bisignatus and 



