392 PROCEEDINGS OF THE NATIONAL MUSEUM vol.88 



just behind the anterior crenulate margin. Declivity evenly arched, 

 not sulcate, but with first and second striae more deeply impressed, 

 the interspaces weakly convex. 



Ventral surface dark reddish brown, shining, sparcely clothed with 

 nearly white, bifurcate, recumbent scales, except on the last three 

 abdominal segments, which have erect, fulvous setae. Foretibia 

 (fig. 18, g) with eight rather long, slender teeth on outer margin. 



Type locality. — ^Williams, Ariz. 



Host. — Coicania mexicana D. Don. 



Type material. — Holotype and one paratype, U.S.N.M. No. 52953. 



Remarks. — Holotype and one paratype taken from Cowania 

 mexicana at Williams, Ariz., by Schwarz and Barber. These two 

 specimens were associated with numerous specimens of Renocis 

 com^mixtus^ new species. 



RENOCIS COMMIXTUS. new species 

 FiGUBEs 17, k, I; 18, h, i 



Female. — Brown to piceous, clothed with intermixed brown and 

 ashy- white scales and setae; 1.6 to 2.2 mm. long; holotype 2.0 mm. 

 long, almost exactly twice as long as wide. 



Frons with a short sharp point in median line of epistomal margin, 

 wdth a dense fringe of rather long, coarse, yellowish hair; trans- 

 versely impressed above the epistoma, with this impression much 

 widened in the median area forming an approximately triangular 

 concavity, with the sides elevated and gi-anulate-punctate ; surface 

 shining, concavity finely, not closely punctured, scantily covered by 

 coarse, moderately long, fulvous hairs, which are much more abun- 

 dant and conceal the surface at the sides and above. Eye finely 

 granulate, 3.3 times as long as wide, the anterior margin distinctly 

 sinuate. Antenna (fig. 17, I) with the club 2.4 times as long as 

 wide, as long as funiculus and visible part of scape together, with 

 three nearly straight setigerous-annulate sutures. 



Pronotum 1.5 times as wide as long, widest near the base, which is 

 procurved; the sides strongly arcuate on the posterior two-thirds, 

 strongly constricted in front of middle, with a moderate transverse 

 impression behind anterior margin, which is broadly rounded, very 

 feebly or not at all sinuate in middle; surface shining, finely and 

 densely granulate-punctate, with three small groups of small sharp 

 asperities on each side, one group just behmd anterior margin, one 

 behind the transverse impression, and a third group two-fifths of 

 distance between second group and posterior pronotal border, surface 

 clothed with small recumbent scales, those on the anterior part of 

 disk brown, those on sides and on posterior part of disk a variable 

 mixture of brown and nearly white scales ; anterior pronotal margin 



