6 PROCEEDIIfGS OF THE IS^ATIONAL MUSEUM vol.86 



tlie notch slightly wider than deep, apex angular; seventh sternite 

 very broadly and feebly emarginate throughout its width. Eighth 

 tergite of female 4-lobed, the lobes long and slender, the median pair 

 a little longer and separated by a narrow acute excision ; eighth ster- 

 nite with six lobes, the median pair longest and each bearing two 

 spinules at tip. laterals blunt and each bearing a stout spine. 



Type locality. — Valley of the Gila River, Ariz. 



Lectotype. — Mus. Comp. Zool. no. 6497. Bears only a silver disk. 



Localities represented. — Specimens have been seen also from Ari- 

 zona (Tucson, Catalina Springs) and California (Hesperia, El Rio, 

 Calaveras). 



Remarks. — The three males in the Horn collection all have the sex- 

 ual characters of ventriculus. The name used by LeConte for this 

 SDecies was preoccupied by Kraatz, who used it four years previously 

 for a species from "India orientale." 



COPROPORUS LAEVIS LcConte 



1863. Coproponis lacvis LkConte, Smithsonian Misc. Coll., vol. G, no. 167, p. 31. 

 1877. Erchomus laevis (LeConte), Hokn, Trans. Anier. Ent. Soc, vol. 6, p. 108. 



Piceous to piceotestaceous ; antennae, trophi. and legs testaceous. 

 Head transverse, not abruptly declivous, triangular in front; smooth, 

 shining, impunctate; gula wide in front and at rear, narrowed be- 

 liind the middle; ventral surface strigulose. Antennae not quite so 

 long as head and prothorax together, with segments S-10 transverse, 

 the eleventh not quite so long as the ninth and tenth together. Maxil- 

 lary palpi unusually long, fourth segment longer than the third, as 

 large at base, conical. Pronotum smooth, shining, impunctate. 

 Mesosternmn moderately carinate posteriorly. Elytral surface un- 

 even, but shining, impunctate except at the sides; sides with a dis- 

 tinct concavity at middle above the margin; epipleurae free from 

 inner surface of elytra but inflexed far above the horizontal position. 

 Abdomen feebly margined, surface strongly but sparsely punctate 

 throughout, strigulose. Eighth tergite of male with four triangular 

 lobes, the median pair more posterior, separated by a narrowly 

 rounded excision; eighth sternite with a broad triangular notch, one- 

 quarter wider than deep, angles prominent. Eighth tergite of female 

 with four slender elongate lobes, the median pair a little longer, all 

 separated by acute incisures; eighth sternite with six lobes, the me- 

 dian pair much longer, broad, and armed with three or four spinules 

 at tip, lateral lobes descending, each bearing a large black seta at 

 apex. 



Type locality. — Southern States. (The type specimen bears a small 

 pink square, apparently indicating "Middle States.") 



