132 MISC. PUBLICATION 6 9 8, U. S. DEPT. OF AGRICULTURE 



Elytra at base slightly narrower than pronotum along middle ; sides 

 slightly expanded posteriorly, conjointly broadly rounded at apices; 

 surface rather densely clothed posteriorly with short, recumbent, 

 whitish and brownish hairs, nearly glabrous on basal third, coarsely, 

 densely, irregularly punctate on basal two-thirds, very finely, indis- 

 tinctly punctate on apical declivity; sutural and lateral margins 

 slightly elevated on apical declivity ; each elytron with two large tu- 

 bercles along anterior margin of apical declivity, the tubercles spini- 

 f orm at apices. 



Abdomen beneath finely, indistinctly granulose, sparsely clothed 

 with short, recumbent, white hairs, with a few long, erect hairs on last 

 visible sternite, which is broadly rounded or subtruncate at apex. 



Female. — Differs from the male in having the front of the head 

 more coarsely punctate, densely clothed with long, erect hairs, and 

 with two distinct tubercles at the middle, and the last visible abdomi- 

 nal sternite about as long as the preceding sternites united, opaque, 

 densely granulose, with a very deep emargination, which extends 

 nearly to the base of the sternite. 



Length 3.5-4.5 mm., width 1.4-1.6 mm. 



Type locality. — Yermo, Calif. 



Type, allotype, and paratypes. — In the United States National Mu- 

 seum, No. 58318. 



Described from four specimens (one male type) collected at the 

 type locality, November 27, 1937, from mesquite (Prosopis sp.) by 

 P. C. Ting. 



Xyloblaptus quadrispinosus (LeConte) 



Sinoxylon quadrispinosus LeConte, 1866, Smithsn. Inst. Misc. Collect. 167 : 100 ; 



Horn, 1878, Amer. Phil. Soc. Proc. 17 : 542, 543. 

 Xylopertha quadrispinosus Gorham, 1883, Biol. Centr.-Amer., Coleopt, v. 3, pt. 2, 



p. 217. 

 Dendrobiella quadrispinosus Casey, 1898, N. Y. Ent. Soc. Jour. 6 : 67. 

 Xyloblaptus quadrispinosus Lesne, 1901, Soc. Ent. de France Ann. (1900) 69: 



514-516, figs. 301-302; 1938, in Junk (pub.), Coleopt. Cat., pt. 161, p. 60; 1939, 



Rev. Franc, d' Ent. 6 : 118. 



Male. — Head brownish black ; pronotum and elytra reddish brown, 

 the anterior part of pronotum slightly darker, and basal half of elytra 

 brownish yellow ; underside of body reddish brown, except antennae, 

 palpi, legs (except sometimes anterior tibiae), and abdomen in part, 

 brownish yellow. 



Head slightly convex, with two small, obsolete, median tubercles on 

 front, usually with a smooth spot behind tubercles, sparsely, finely 

 punctate on front and clypeus, with fine, longitudinal, parallel costae 

 on occiput, sparsely clothed with long, erect and recumbent, white 

 hairs; clypeus longitudinally grooved at middle, broadly depressed 

 at middle along posterior margin ; clypeal suture distinct. 



Pronotum distinctly wider than long, widest along middle; sides 

 nearly parallel at middle, broadly rounded posteriorly and anteriorly, 

 with a small, broad tooth at apical angles; surface sparsely clothed 

 with short, recumbent and erect, inconspicuous hairs, which are more 

 numerous on apical part, indistinctly punctate at sides on basal half, 

 very finely, sparsely, cuneate-punctate on medial part of basal half, 

 irregularly, densely dentate on apical half, the teeth broad, semierect, 

 variable in size, and rasplike, with two or three larger teeth on each 

 side near apical angle. 



