I'lC. 



PS re HE. 



[Octnher — Deci-nibcr 1SS4. 



upon occasion make good use of their 

 wings, but probably fly only at night, 



KisC- ij. //ypotrichia sjtissijfes Lcc. a, antenna of 

 male; l>, antenna of female; c, front tibia of male; »/, 

 ditto, female. 



and arc more sul)tcrranean in their 

 habits than the males ; this is indicated 

 also bv their form, which is heavier, 

 more strongly built, and less pubescent 

 than in the male. As this beetle has 

 hitherto been known in the male sex 

 only, I add a description of the female.' 

 Description of tlie female. — Coloi' 

 piceo-rufous, head and thorax darker ; 

 body shining, beneath sparsely pubes- 

 cent, above very sparsely covered wifh 

 short, stifl". hairs ; head small, convex, 

 eyes small, scarcely visible from above ; 

 two basal joints of antennae enlarged) 

 as in the male, the tlvc following joints 

 globular; club etjual in length to the 

 five preceding joints, with a conical 

 prominence on its outer face ; thorax 

 rounded, convex, coarsely punctate ; 

 scutellum short, nearly triangular, not 



' Leconte's original description of the male may be 

 found in liis "Classification of the coleoptcra of North 

 America . . . . pt. r'(Smithsonian misc. coll., 1862 v. 3), 

 P- '37- 



roundetl behind ; el\ tra shining, coarsely 

 but obsoietelj' punctate, sutural .stria 

 well marked ; pygidium much wider 

 than long, finely and denselv punctate. 



The female is somewhat larger, more 

 elongate and more convex than the male 

 and is without the long antl dense 

 pubescence so conspicuous in that sex ; 

 the bead, and especially the eyes are 

 smaller; the thorax is larger, much 

 more convex lateralh' and longitudi- 

 nally, the base less lobed at middle, 

 and is much less denselv and more 

 coarsely punctiued ; viewed from above 

 the convexitv of the sitles conceals the 

 true margin of the thorax which thus 

 appears more regularly rounded than in 

 the male. The five joints which con- 

 stitute the scape of the antennae are well 

 separated, and not connate as in the 

 male, and the conical projection, which 

 in the male appears upon the edge of 

 the last joint, and gives to the antenna 

 an irregular outline, is centrally placed 

 in the female, and, the club is regidarly 

 oval in outline. 



The legs of the female are stouter, and 

 project rigidly from the bodv. rcc;dling 

 the characteristic appearance of the 

 orvctiiii, {Oiyctcs. ApJioniis, etc.). 

 The front legs are especially fossorial, 

 the tibia being very broad, excavate 

 within, and armed with three stout teeth 

 on the outer edge. The male tibia is 

 straighter and narrower, and has onlv 

 two teeUi. 



The remarkable sexual difi'erences in 

 this species call to mind the still greater 



