84 PROCEEDINGS OF THE NATIONAL MUSEUM tou 89 



PHYLLOPHAGA (USTROCHELUS) CHAPINI. new species 



Figures 7, g-j; 8, o 



Male. — Very similar in all respects to L. huachuca Saylor, differing 

 mainly in the genital characters. The area at the base of the clypeus is 

 usually slightly to noticeably tumid in both sexes, while it is usually 

 more flattened in L. huachuca. 



Female. — Apical portion of the pygidium consisting of a large, 

 smooth, and raised area in the shape of a very wide V, and is almost 

 semicircular (fig. 8, o), whereas in L. huachuca the raised smooth area 

 is a narrow, V-shaped area. 



Length. — 16.5-19 mm. Width. — 7-8 mm. 



Types. — Holotype and allotype are from "Fort Grant, Arizona, 

 collected July 22 by Hubbard and Schwarz" and are in the United 

 States National Museum (No. 53762). 



Paratypes : Males, 26 ; females, 1 1 . Akizona : Fort Grant [U.S.N.M. 

 and Saylor]; Chiricahua Mountains, July [U.S.N.M.], July 13 (Van 

 Dyke), June 10 [Saylor], and July 10 [Saylor]; Pinery Canyon, Chi- 

 ricahua Mountains, 6,000 feet, July 1 [American Museum]; mouth of 

 Rucka Canyon, Chiricahua Mountains, July 7 (Van Dyke). New 

 Mexico: "New Mexico" [U.S.N.M.]; Silver City, July 22 (Jackson) 

 [Snow Museum]. 



Remarks. — Wliile closely allied to L. huachuca, this species appears 

 to be consistently different in both sexes and well deserving of a 

 name. I take pleasure in naming this species for my good friend Dr. 

 E. A. Chapin, of the National Museum, as a slight token of my 

 appreciation of many kindnesses, both past and present. 



PHYLLOPHAGA (LISTROCHELUS) FLAVIPENNIS (Horn) 



Figures 2, f-g; 10, a-d 

 Listrochelus flavipennis Horn, Trans. Amer. Ent. Soc, vol. 12, p. 123, 1885. 



Male. — Elongate-oval, strongly shining, elytra sparsely haired 

 above. Head with front closely and coarsely rugose, transverse ridge 

 of vertex moderately strong; clypeal suture hardly impressed, strongly 

 bisinuate; clypeus punctured like front, apex truncate, apical margin 

 slightly reflexed, angles strongly rounded. Antenna testaceous, 10- 

 segmented, club about one-fourth to one-third longer than funicle. 

 Thorax finely, moderately densely punctate, center of disk often with a 

 suggestion of a smooth median line; base and apex strongly margined, 

 sides finely crenulate and ciliate; front angles rounded, hind angles 

 obtuse but subangulate. Elytra finely, rugosely punctate, with 

 sparsely placed, short, erect hairs; first striae, besides sutural, strongly 

 oblique, obsolescent in basal half, much wider and more pronounced 

 apically. Pygidium strongly convex, highly polished, finely sparsely 



