Coleopterological Notices, VI. 651 



joint of the posterior tarsi scarcely as long as the remainder, the 

 third short. Mesosternum expanded in a broad, highly polished 

 irnpunctate and glabrous plate, its outline at the sides rounded 

 and not furnished with long setie, the episternum tumid, visible 

 from above, discontinuous in level with the met-episternum, the 

 mes-epimeron ver3- narrow and subobsolete. 



The type is Anthicus tenuis of LeConte (Ann. L3'c., N. Y., Y, 

 p. 153), very abundant in the desert regions from western Texas to 

 southern California. The male has the fifth ventral much longer 

 than the preceding, rather strongly rounded at apex and unmodi- 

 fied, the sixth or genital segment coriaceous, emarginate in the 

 middle at apex, the copulatorj' spicule abruptlj' narrowed and 

 prolonged for a short distance at apex. 



MALPORUS n. gen. 



In this genus the head is more strongly and circularlj^ rounded 

 behind than in Lappus, and the sculpture and vestiture of the bod}' 

 are peculiar, the elytra being ver}- coarsel}' and unequally punc- 

 tate and bristling with long erect tactile setae. The last joint of 

 the maxillarj' palpi is moderate in size, and very difl["erent from 

 the form occurring in the genus Lappus. Our species ma}' be 

 distinguished thus : — 



Elytral punctures distinct throughout the disk, though fine and remote toward 

 apex, closer and coarse before the middle; posterior part of the disk but 

 slightly convex in profile; elytra but slightly narrowed toward base. 



Prothorax very strongly constricted; body throughout more sparsely punc- 

 tate, the elytra without an apical pale spot 1. formicariiis 



Prothorax much less strongly constricted; punctures throughout denser; 

 elytra more parallel, the pale fascia less Ijasal, each having an apical pale 



spot; antennae longer and more slender 2. Giiictus 



Elytra devoid of distinct punctuation, except in the subbasal impression 

 which is strong. 



Elytra elongate, the pronotum not impressed 3. properus 



Elytra much shorter and more strongly convex in profile, the pronotum 

 feebly impressed along the median line 4. blandus 



The corneous copulator}- sheath of the male is elaborately modi- 

 fied in this genus as described below, the efierent duct lying in a 

 cavity of the under surface. In comparing this structure, which 

 is the prevailing type throughout the Anthicini, w4th the pro- 

 jecting " spike " which I have previously noted in Hymenorus 

 (Col. Not. Ill, pp. 70, 89), the homology seems to be evident, 



