14 GEO. H. HORN, M. D. 



darker in color than above, abdomen closely but indistinctly punctulate. Meta- 

 stermira with mesocoxal line, which is, however, indistinct. Legs entirely pale. 

 Length .08— .10 inch. ; 2—2.5 mm. PI. 1, fig. 12. 



Male. — Labrum broader than long, narrowed to apex, the tip entire. Mandi- 

 bles not prominent, but with a basal lobe prolonged from the inner side over the 

 base of labrum in front of the clypeus. Thorax as wide as the elytra, sides ar- 

 cuate, not narrowed in front. 



i^ema/e.— Labrum similar to that of male, but broadly truncate at apex. 

 Mandibles without basal lobe. Thorax distinctly narrowed in front. 



Variations. — Many specimens are entirely testaceous in color with 

 the head alone darker, these are luteohis Lee. and when sliglitly fer- 

 ruginous are typical of pusillus Say. By for the larger number 

 have the greater portion of the disc of thorax pale fuscous, the mar- 

 gins broadly pale and with an equally broad fuscous space on the 

 elytra not reaching the apex, these are limbatus Kies. Rarely the 

 darker space on the elytra is narrowed to a vitta on each elytron. 



The only species with which this might be confused is coUaris, 

 in its very small form. The males are readily known. The fe- 

 males are difficult to separate in description, but it will be observed 

 that the markings of the elytra in collaris although indistinct, are 

 of the sinuous band type. 



Occurs from Allegheny, Pa. (Hamilton), westwardly to Illinois, 

 thence to Texas, Arizona, southern California and northern Mexico. 



H. auroinicans Kies. — Oblong, convex, more obtuse at the extremities 

 than usual, surface sparsely clothed with golden, short, scale like, recumbent 

 hairs, the margin not fimbriate, color piceous, sides and median stripe of thorax 

 pale, elytra with sides, two sinuous vittte and short subapical luuule yellow. 

 Antennte pale brown. Head piceous, densely punctulate. Thorax twice as wide 

 as long, sides feebly arcuate posteriorly, more strongly in front, base arcuate, 

 slightly oblique each side, the marginal line very distinct, hind angles more 

 defined than usual, surface rather more coarsely and less closely punctate than 

 usual in the genus; color piceous, the sides and a median stripe paler, these of 

 variable width. Elytra parallel, substriate, closely punctulate, color piceous, 

 the entire lateral margin narrowly yellow, two sinuous bands, the anterior very 

 oblique, the posterior more transverse, near apex a rudiment of a recurrent 

 lunule. EpipleuriB pale, an oblique elevated line near the base. Body beneath 

 piceous black, the prothorax in great part yellow, abdomen, in feebly mature 

 specimens, piceous the tip of the last segment and a spot on each side of the 

 two preceding yellow. Metasternum with distinct mesocoxal line. Stridulating 

 ridge of first ventral segment entire. Femora and tarsi rufotestaceous, tibiae 

 piceous. Length .12— .16 inch.; 3—4 mm. PI. 1, fig. 11. 



Male. — Labrum transverse, narrowed in front, apex emarginato-truncate 

 Mandibles slightly prominent, the teeth small. Clypeus slightly emarginate, 

 front slightly retuse. Thorax more than twice as wide as long, slightly wider 

 than the elytra, sides suddenly arcuate at the front and abruptly narrowed to 

 the head. 



