XORTH AMERICAN BOSTRICHIDAE 39 



punctate, the punctures more distant along sutural margins, sparsely 

 clothed with short, inconspicuous, erect hairs, and with a large, 

 recurved tubercle on each side near middle of declivity. 



Body beneath sparsely clothed with rather long, recumbent, yel- 

 lowish hairs; abdomen coarsely, shallowly punctate, and finely, 

 densely granulose; prosternum rugose. 



Length 6 mm., width 2 mm. 



Type locality. — Cave Creek Canyon, Chiricahua Mountains, Ariz. 



Type and paratype. — In the United States National Museum, Xo. 

 58311. 



Described from two specimens (one type). The type (probably 

 a male) was collected at light. July -1, 1897, by H. G. Hubbard, and 

 the paratype was collected at Douglas, Chiricahua Mountains, Ariz., 

 August 7, 1938, by W. W. Jones. 



This species is closely allied to punctatus (Say), but it differs from 

 it and all the other known species of this genus in being larger, and 

 in having a large recurved tubercle on each side of the apical decliv- 

 ity of the elytra. 



Prostephanus truncatus (Horn) 



Dinodcrus truncatus Horn, 1878. Amer. Phil. Soc. Proc. 17: 549, 550; Riley. 



1894, Insect Life 6: 219; Chittenden, 1895, Insect Life 7: 327; 1896, U. S. 



Dept. Agr. Div. Ent. Tech. Ser. 4. i>. 28; Casey, 1898, N. Y. Ent. Soc. Jour. 6: 



76; Chittenden. 1911. U. S. Dept. Agr. Bur. Ent. Bui. 96, pt. 1, pp. 1, 4, 9 : ibid. 



96, pt. 3, pp. 48-52, figs. 9-10 ; Back, 1919, U. S. Dept. Agr. Farmers' Bui. 1029 ; 



pp. 21-23, fig. 15 : Back and Cotton, 1922, U. S. Dapt. Agr. Farmers' Bui. 1260, 



p. 13, figs. 13-14; 1930 (revised), pp. 9-11, fig. 13; Back, 1931, U.S. Dept. 



Agr. Farmers' Bui. 1029 (revised), pp. 17-19, fig. 15. 

 StepJianopachys truncatus Back and Cotton, 1940, U. S. Dept. Agr. Farmers' 



Bui. 1260 (revised), pp. 7-8, figs. 8-9. 

 Prostephanus truncatus Lesne. 1898, Soc. Ent. de France Ann. (1897) 66: 342, 



343, figs. 14b, 25, 26; 193S. in Junk (pub.), Coleopt. Cat., pt. 131, p. 22; 1939; 



Rev. Franc. d'Ent. 6 : 91, 92-93. 



Pale reddish brown to brownish black, the palpi, antennae, and 

 legs paler. 



Head with front finely, sparsely punctate, sparsely clothed with 

 long, inconspicuous, semierect hairs, narrowly, abruptly deflexed at 

 anterior margin: clypeus flat, densely, coarsely punctate, sparsely 

 clothed with long, inconspicuous, semierect hairs, with two small 

 tubercles at middle along anterior margin. Antennal club densely 

 clothed with short, recumbent, yellowish hairs, with a few long, erect 

 hairs intermixed, the first segment transverse, oval, second subtri- 

 angular, and third oblong. 



Pronotum strongly, uniformly convex, widest near basal fourth, 

 without a distinct, longitudinal groove at middle of disk; sides with 

 a row of small teeth on each side along lateral margin; surface 

 sparsely clothed with short, inconspicuous, recumbent hairs, densely. 

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

 the imbrications narrow and narrowly rounded anteriorly, and with 

 transversely arcuate rows of elevated teeth at middle on apical half, 

 the teeth obtusely rounded at apices and distinctly separated from 

 one another (the two median ones on anterior margin nearly con- 

 tiguous). 



Elytra at base as wide as pronotum at basal fourth: sides parallel, 

 conjointly broadly rounded at apices; surface coarsely, densely punc- 



