86 PROCEEDINGS OF THE NATIONAL MUSEUM vol.89 



ciliate. Abdomen flattened and faintly concave at center, highly 

 poUshed except for a few patches of pruinosity at sides of segments 3-5; 

 at center of segments 1-4 with fine, sparse granules and small hairs; 

 segment 5 nearly plane at middle, with a few coarse punctures and 

 hairs along the apical margin and at the sides; sixth segment shorter 

 than the fifth, smooth at the center and coarsely, setigerously punctate 

 at the sides; both fifth and sixth with a moderate longitudinal sulcus at 

 the middle. All claws strongly pectinate along a double margin and 

 without any larger teeth intercalated. Hind tarsus with first segment 

 shorter than the second. Front tarsus without a small spine at inner 

 apex of each segment. 



Female. — Antenna shorter than funicle. Pygidium flattened and 

 rugose in basal three-fifths, with fine, dense punctures and short 

 suberect hair; apical two-fifths of disk slightly and gradually raised 

 from the disk, polished and very sparsely punctate, apex densely 

 ciliate; pygidial disk from a lateral view appearing quite flat, to 

 slightly concave. Abdomen slightly convex, somewhat pofished, 

 coarsely punctate ; fifth segment with a suggestion of two blunt trans- 

 verse parallel ridges near base; sixth with very coarse, dense punctures, 

 the hairs moderately long and erect. AU claws with a submedian 

 tooth and serrate along a double margin (at times apparently along a 

 single margin only), except that the inner hind claw usually does not 

 have the larger intercalated tooth. Otherwise as in the male. 



Length. — 14-17 mm. Width. — 6-7.5 mm. 



Types. — Holotype and allotype are from Patagonia, Ariz., collected 

 on July 6 by M. A. Cazier (Saylor collection) and are in the United 

 States National Musemn (No. 53763). 



Paratypes: Males, 13; females, 3. Arizona: Fort Grant [U.S. 

 N.M. and Saylor]; Patagonia, July 6 (Cazier) (Ross and Cazier) 

 [Saylor and Cazier]; Catalina Mountains, 5,500 feet [Saylor]; Nogales, 

 Santa Cruz County (Nunenmacher) [Saylor]; Santa Rita Mountains 

 [Saylor]; Tucson, July [Saylor]. Mexico: Bakachaka, Rio Mayo, 

 Sonora, August 25 (Gentry) [Saylor]. 



Remarks. — The female pygidium varies shghtly as to the convexity 

 of the disk, in one example being flat and semirugose and in the other 

 semiconcave and rugose. Externally similar in general facies to L. 

 flavipennis but quickly separated by the tumid clypeus of both sexes 

 as well as the quite different male genitalia. 



PHYLLOPHAGA (LISTROCHELUS) MUCOREA (LeConte) 



Figures 8, d-f 



Listrochelus mucoreus LeConte, Journ. Acad. Nat. Sci. Philadelphia, ser, 2, 

 vol. 3, p. 263, 1856.— Horn, Trans. Amer. Ent. Soc, vol. 7, p. 144, 1878.— 

 Bates, Biologia Centrali- Americana, Coleoptera, vol. 2, pt. 2, p. 173, 1888. 



Listrochelus texanus LeConte, op. cit., p. 263, 1856. — Horn, op. cit.,p. 144, 1878. 



Listrochelus obtusus LeConte, op. cit., p. 264, 1856. — Horn, op. cit., p. 144, 1878. 



