130 MISC. PUBLICATION 698, U. S. DEPT. OF AGRICULTURE 



suture usually not distinct; first segment of antennal club subtrian- 

 gular, with the outer apical angle not projecting outward. 



Pronotum slightly wider than long, widest at middle ; sides nearly 

 parallel along basal half, arcuately converging anteriorly; anterior 

 and posterior angles broadly rounded; surface densely, irregularly 

 clothed with long, recumbent, yellowish hairs, which are shorter and 

 more or less erect on anterior declivity, finely, densely punctate at 

 sides on basal half, coarsely imbricate-punctate at middle on basal 

 half, granulose and irregularly dentate on apical half, the teeth broad, 

 semierect, variable in size, and rasplike. 



Elytra at base subequal in width to pronotum at middle; sides 

 slightly expanded posteriorly, conjointly broadly rounded at apices; 

 surface densely clothed with short, recumbent, more or less arcuate, 

 yellowish hairs, coarsely, sparsely, irregularly, shallowly punctate 

 on basal half, finely, obsoletely punctate on apical declivity; apical 

 declivity with lateral submargins slightly elevated and united with 

 lateral margins, obtusely rounded on top, and curving inward to near 

 exterior tubercles, sutural margins not distinctly elevated; each ely- 

 tron with two long, costiform tubercles along anterior margin of 

 apical declivity, the tubercles obtusely rounded at apices. 



Abdomen beneath finely, densely punctate, densely clothed with 

 long, semierect and recumbent, yellowish hairs; last visible sternite 

 broadly rounded at apex. 



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

 flattened or concave, glabrous, strongly shining, finely and sparsely 

 punctate, and with two small, distinct tubercles at the middle behind 

 the eyes, the clypeal suture distinct and sulciform, the left mandible 

 more strongly toothed on the inner margin near the apex, and the last 

 visible abdominal sternite thickened at the apex. 



Length 5-7 mm., width 2-2.5 mm. 



Type locality. — Of sericans, Einggold Barracks, Tex. ; type in the 

 LeConte Collection in the Museum of Comparative Zoology, Cam- 

 bridge, Mass. Of pubescens, Brownsville, Tex.; type in the Casey 

 Collection in the United States National Museum. 



Distribution. — From material examined: 



Texas: Brownsville, May 4, 1904 (H. S. Barber); June to August (Charles 



Schaeffer). 

 Mexico : Nuevo Laredo, Tuxtepec, and Rosario. 

 Guatemala : El Rancho. 



Hosts. — This species has been reared from horsebean (Parkinsonia 

 aeuleata Linnaeus), huisache (Acacia farnesiana (Linnaeus) Willde- 

 now) , mesquite (Prosopis juliflora (Swartz) de Candolle) , royal poin- 

 ciana (Poinciana regia (Rafinesque) Bojer), and chinaberry (Sapin- 

 dus sp.). 



Casey (1898) described pubescens from representatives of both 

 sexes, from material collected at Brownsville, Tex. Lesne (1901) 

 placed pubescens as a synonym of sericans LeConte. 



Genus XYLOBLAPTUS Lesne 



XploUaptus Lesne, 1901, Soc. Ent. de France Ann. (1900) 69: 476, 514-516, figs. 

 301-302; 1938, in Junk (pub.), Coleopt. Cat., pt. 161, p. 60; 1939, Rev. Franc 

 d'Ent 6: 118-123. 



Head deeply inserted in prothorax, not visible from above ; clypeus 

 strongly transverse, with a tooth on each side at base of labrum ; la- 



