82 PROCEEDINGS OF THE NATIONAL MUSEUM vol.89 



densely punctate at center, with short suberect bristles; fifth segment 

 one-third longer than fourth; sixth segment a little shorter than fifth, 

 with a deep longitudinal median sulcus, surface finely punctate, with 

 short erect hairs, sides with numerous small, transverse, and sca- 

 brous filelike elevations. Hind femur with a single transverse sub- 

 marginal line of 8 or 9 strong spines set in punctures. All tarsal claws 

 strongly pectinate along a double margin, without larger intercalated 

 teeth. First segment of hind tarsus longer than the second. 



Female. — Antennal club shorter than funicle. Pygidium slightly 

 convex and pruinose basally and somewhat concave and polished 

 apically; apical margin a raised smooth area in the shape of a very 

 wide-mouthed V and punctured near apex; entire disk with fine dense 

 punctures, each with a short erect hair; disk just basad of the apical 

 raised area somewhat rugose. Abdomen convex, highly polished and 

 sparsely, finely punctate at middle; fifth segment depressed in apical 

 fourth; sixth nearly as long as the preceding, flattened, with moder- 

 ately coarse and dense setigerous punctures. All claws with a strong 

 median tooth, the surface each side of the tooth serrate to subpectinate 

 along a double margin. Otherwise similar to male. 



Length.— 1^-20 mm. Width.— 7-^ mm. 



Type. — In the Horn collection in Philadelphia. 



Tyjpe locality. — "Colorado, New Mexico, and Arizona." 



Specimens examined. — Males, 21; females, 23. Arizona: Central 

 and eastern portions of the State, especially in the Flagstaff and Pres- 

 cott areas, July and August. Colorado: Custer County (Cockerell) 

 [U.S.N.M.]. New Mexico: Frequent around Las Vegas and the 

 central areas of the State and seen also from Cloudcroft, August; 

 Jemez Mountains on July 24 at 9,000 feet [Calif. Academy]. Mexico: 

 "Mexico" [Casey and Saylorj. 



Remarks. — A wide-ranging species that caimot be easily confused 

 with any other United States species except possibly in the female of 

 L. huachuca and L. chapini; these latter two are easily separated by 

 their much less robust form, much denser pruiuosity, and the pygidial 

 characters as given in the keys. The Mexican specimens are notice- 

 ably hairier on the elytra in both sexes but are not otherwise different 

 from the United States specimens. 



PHYLLOPHAGA (LISTROCHELUS) HUACHUCA, new species 



FiGUEEs 7, a-d; 8, n; 13, i 



Male. — Strongly elongate, rufocastaneous, highly polished except for 

 the densely pruinose elytra; head and thorax glabrous. Head with 

 very dense and coarse variolate punctures; clypeal apex hardly 

 reflexed, sub truncate, the angles broadly rounded; transverse carina 

 of the vertex moderately strongly indicated, surface behind the latter 



