102 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 89 



scattered hairs. Head with coarse and dense punctures, with a few 

 fine ones intermixed; clypeus with rounded, usually moderately 

 reflected apex, angles veiy broadly rounded. Antennal club one- 

 sixth longer than the funicle. Thorax with fine, dense punctures, 

 disk usually glabrous; lateral margins coarsely crenate and with long 

 cilia. Elytra finely, regularly punctate, with scattered fine and erect 

 hairs, the latter moderately long; striae, except sutural, obsolete. 

 Pygidium convex, strongly and entirely poHshed, with fine scattered 

 punctures, apparently glabrous; apex truncate and slightly sinuate. 

 Abdomen with segment 3 transversely raised and segments 4 and 5 

 having in common between them a deep and wide transverse im- 

 pression; fifth and sixth more coarsely punctate and each with a 

 very weak longitudinal sulcus at the middle. All claws serrate 

 apparently along a single margin (traces of a double margin under 

 power of 20 X) and each with a very small tooth slightly above the 

 middle; this, however, is frequently worn down on one or all claws so 

 that it is not visible at all. Inner face of hind tibia with moderately 

 long bristles (not hairs); under soles of hind tarsus with but very 

 sparse bristles (not hair). Inner apex of first front tarsal segment 

 with a very blunt and short spine. 



Female. — Antennal club equal to segments 3-7 combined. Pygi- 

 dium as in male but much more flattened. Abdomen convex, apex 

 of fifth segment somewhat depressed, smooth; sixth segment convex, 

 the disk sparsely and setigerously punctured. All claws minutely 

 dentate near the base and with a small but sharp median tooth. 



Length. — 12-14 mm. Width. — 5.5-7 mm. 



Tyj^e. — In the British Museum (Natural History). 



Type locality. — "Refugio and Cuidad in Durango, Mexico." 



Specimens examined. — Males, 11; females, 2. Texas: Davis 

 Mountains [Saylor]; Davis Mountains, July 9, 1921, (C-D. Duncan) 

 [Van Dykel. Mexico: Cusihuiriachic, Chihuahua, [Saylor] ; Zacatecas, 

 Zac. [Saylor]. 



Remarks. — The males at hand fit Bates's description exactly, and 

 this, coupled with the fact that both the Mexican localities recorded by 

 Bates for L. parilis are close to those from which come my Mexican 

 examples (which are specifically identical with my Texas specimens)., 

 leaves little doubt that the species is correctly determined. 



This species is most closely related to L. fimbripes and L. koehleriana, 

 from both of which it can be readily separated by the spinose and not 

 hairy hind tibiae and tarsi; also, the male genitalia are specifically 

 different among the three species. 



