274 GEO. H. HORN, M. D. 



nearly as long as the first three. Tibiae dilated, claws simple. Elytra 

 not margined except very feebly near the humeri, epipleurae indistinct. 

 Thorax at base free. 



The males have a sixth segment visible on the dorsal aspect of the 

 abdomen. 



The characters above given indicate a genus allied to Amarfioa by 

 its mandibles prominent beyond the labrum, its simple claws and the 

 presence of an additional segment in the male. It diflfers in the 

 thorax being free at base, not overlapping the sides of the base of 

 the elytra, its much more depressed form and nearly glabrous surfiice 

 and the more prominent male segment. In Amartiis, although the 

 male has an additional segment, the pygidium is similar in the two 

 sexes and in the male covers the additional sixth when viewed from 

 above ; beneath however the segment is visible. In the present genus 

 the segment is quite as distinct as in Carpophilus, and the species 

 might even be mistaken for a member of that genus. It has nothing 

 in common with Colastus where Mr. Crotch placed it. 



A. agavensis Crotch, ( Colastus). — Oblong oval, depressed, piceous, varying 

 to ferruginous with paler elytra, surface shining, very sparsely pubescent. 

 Head moderately punctate. Thorax one-third wider than long, apex and base 

 equal, sides regularly arcuate, angles obtuse, disc depressed, surface rather 

 coarsely but not densely punctate. Scutellum punctate. Elytra a little longer 

 than wide conjointly, slightly broader behind, surface moderately densely 

 punctate. Abdomen punctured similarly to the elytra. Presternum sparsely 

 punctate, metasternum coarsely punctured at the sides, abdomen very sparsely 

 punctate. Length .16 — .18 inch; 4 — 4.5 mm. (PL III, fig. 5). 



The additional segment of the male is oval, slightly concave, and 

 not deflexed, the true pygidium is slightly eniarginate. 

 Occurs in the flowers of Agave in southern California. 



CARPOPHILINI. 



Maxillae with one lobe. Antennae terminated by an abrupt three- 

 jointed club, antennal grooves distinct. Tarsi dilated but some- 

 times feebly. Two or three segments of abdomen visible beyond 

 the elytra. 



These characters apply to the genera in our fauna, there being 

 exceptional cases to one or other character among foreign genera. 



It is worthy of special mention here that in all our genera the 

 males have an additional segment belonging to the dorsal series 

 beyond the pygidium. This additional segment seems to be con- 

 structed on the plan of a hollow cylinder closed at the distal end, 

 and with a larse fenestrum cut out of the lower side to allow of 



