74 MISC. PUBLICATION 6 9 8 ; U. S. DEPT. OF AGRICULTURE 



Distribution. — From material examined : 



Arizona: Douglas, June 19, 1945 (W. W. Jones). Hot Springs, June 27 (Barber 

 and Schwarz). San Simon, July 7 (Hubbard and Schwarz). Sabino Canyon, 

 June 20, 1918 (G. Hofer). 



Caijfoenia: Indio (A. C. Davis). 



Texas : Presidio, May 22, 1945. 



Hosts. — This species has been reared from Hymenoclea monogyra 

 collected in Sabino Canyon, Ariz., by G. Hofer. 



Amphicerus (Schistoceros) simplex (Horn) 



Sinoxylon simplex Horn, 1885, Amer. Ent. Soc. Trans. 12 : 155. 



Micrapate simplex Casey, 1898, N. Y. Ent. Soc. Jour. 6 : 72, 73. 



Schistoceros simplex Lesne, 1899, Soc. Ent. de France Ann. (1898) 67: 509, 523- 



524, figs. 134-135, 

 AmpMcerus (Schistoceros) simplex Lesne, 1938, in Junk (pub.), Coleopt. Cat., 



pt. 161, p. 42. 

 Amphicerus brevicollis Casey, 1898, N. Y. Ent. Soc. Jour. 6 : 69-70 ; Lesne, 1937, 



Soc. Ent. de France Bui. 42 : 238. 

 Amphicerus grandicolHs Casey, 1898, N. Y. Ent. Soc. Jour. 6 : 69, 70 ; Lesne, 1938, 



in Junk (pub.) , Coleopt. Cat., pt. 161, p. 41. (New synonymy.) 



Male. — Elongate, cylindrical, uniformly reddish brown to brownish 

 black, the palpi and antennae yellowish brown. 



Head much narrower than pronotum, transversely flattened behind 

 eyes, coarsely, sparsely granulose and densely clothed with short, erect, 

 yellowish hairs behind clypeus, finely granulose and nearly smooth 

 on transverse flattened area, with long, longitudinal parallel carinae 

 on occiput ; clypeus flat, sparsely, coarsely granulose, densely clothed 

 with short, erect, yellowish hairs; clypeal suture distinct; labrum 

 finely, densely punctate; first segment of antennal club subtriangular. 



Pronotum quadrate, arcuately emarginate in front, widest behind 

 middle, strongly deflexed anteriorly; sides broadly rounded, more 

 strongly converging anteriorly, produced into a short, unciform horn 

 at apical angles; surface finely costulate-punctate on basal half, 

 densely tuberculate on apical half, the tubercles broad, semierect, rasp- 

 like, and rather acute at apices, with six to eight larger tubercles on 

 each side along lateral margin, and with a few short, erect hairs on 

 apical half. Scutellum nearly glabrous. 



Elytra at base slightly narrower than pronotum at middle, truncate 

 at base, without tubercles or callosities on apical declivity ; sutural mar- 

 gins strongly elevated on apical declivity ; sides slightly expanded pos- 

 teriorly, conjointly broadly rounded at apices, margins not elevated; 

 surface coarsely, densely, irregularly punctate, more or less rugose, 

 with a few very short, erect hairs. 



Body beneath finely, densely punctate, sparsely clothed with short, 

 recumbent hairs on mesosternum and metasternum, densely clothed 

 with long, recumbent, yellowish hairs on abdomen. 



Female. — Differs from the male in having the elytra at base subequal 

 in width to the pronotum near the middle, the pronotum truncate or 

 rounded in front, without horns at the apical angles, and the sides of the 

 elytra parallel. 



Length 6.5-9 mm., width 2-3 mm. 



Type locality. — Of simplex, Southwestern Texas ; type in the Horn 

 Collection in the Academy of Natural Sciences of Philadelphia. Of 

 brevicollis and grandicolHs, El Paso, Tex. ; types in the Casey Collec- 

 tion in the United States National Museum. 



I 



