170 Mr. G. Lewis on 



edges behind the head, surface with very fine almost micro- 

 scopic points ; the elytra, inner humeral stria fine, basal, and 

 oblique, apically some darkish points are seen, which are not 

 quite on the surface, dorsal strise 1-3 complete, 4-5 apical 

 and very short, the sutural does not enter the apical black 

 band, and terminates after passing the middle of the dorsum ; 

 the elytra are red, with an apical black band, which continues 

 along the suture and joins the scutellar spot, the scutellar 

 maculation is rectangular at the base, but posteriorly it 

 widens out in a lobe-shaped form and nearly touches the 

 third stria ; the propygidiutn and pygidium are clearly, not 

 closely punctate, except at the apex of the pygidium, where 

 the punctures gradually become fine; the presternum, keel 

 and median area of the anterior lobe with a few fine scattered 

 points, sides more or less with coarse shallow punctures (all 

 the species of this group have the prosterna very similar in 

 structure and not striate) ; the mesosternum is rather widely 

 emarginate and the marginal stria is complete and exactly 

 follows the anterior outline ; the anterior tih'ise, are 3-dentate, 

 apical tooth bifid. 



This species should be placed next to H. militaris, Horn. 

 In the allied species H. biplagiatus, Lec v instnctuSj Lee., and 

 Ul/cei, Horn, the mesosternal stria does not follow the ante- 

 rior outline. 



Hub. Winslow, Arizona ( Wickham). 



Hister tunicatus, sp. n. 



Oblongo-ovatus, convexus, niger, nitidus ; fronte irapressa, stria 

 integra antice recta; pronoto stria laterali externa brevi, interna 

 integra, pone oculos sinuata ; elytris, striis 1-3 integris, 4 late 

 interrupta, 5 brevi, suturali utrinque abbreviata ; mesosterno 

 emarginato, stria integra ; tibiis anticis 3-dentatis, dente apicali 

 minute bifido. 



L. 4§ mill. 



Oblong-oval, convex, black and shining ; the head im- 

 pressed anteriorly, stria complete, well-marked, and straight 

 in front ; the thorax, marginal stria ending after passing 

 behind the eye, external very short (similar to that of H.sar- 

 cinatus, but shorter), internal complete, distinctly sinuous 

 behind the eye, not sinuous laterally, margin rather broad ; 

 the elytra, strise, inner humeral basal, short, and oblique, 

 dorsal 1-3 complete, 4 apical, in length about one third of the 

 length of the elytra, with a short appendage, well behind the 

 base, 5 shorter than the fourth and apical, the sutural apically 

 is slightly shortened and anteriorly ends in the middle of the 



