18-3.] ^83 [Horn. 



H. TJlkei, Horn, Trans. Am. Ent. Soc, 1870, p. 134 ; unzona, Horn, 

 1. c, p. 135. 



Resembles the preceding in form and coloration, and ditters in the 

 presence of an apical siibliumeral stria extending two-thirds to base, 

 close to the first dorsal, and rarely with a short subhumeral appendix. 

 There is also a fourth dorsal at apex of varying length, sometimes ex- 

 tending in front of middle, and more rarely the traces of a fifth. The 

 hind tibiae agree with those of biplagiatus. Legs black or piceous. 

 Length .16-.22 inch ; 4-5.5 mm. 



Occurs in Kansas, Nebraska, Colorado and Arizona. 



H. lueaniis, n. sp. 



Thorax sparsely fimbriate, lateral strise two, entire, at base coarsely 

 punctured, punctures more numerous and coarser toward the sides. 

 Elytra red with sides, apex and trapezoidal scutellar spot black, three 

 entire dorsal stripe and a sutural extending in front of middle. Epipleurae 

 bistriate. Anterior tibite tridentate, the upper tooth feeble, the apical 

 bifid. Hind tibiiB biseriately spinulose. Body beneath and legs black 

 and shining. Length .12 inch ; 3 mm. , 



Resembles biplagiatus but easily known by the form of the anterior 

 tibiae. The subhumeral stria is entirely wanting. One specimen, Cape 

 San Lucas, Lower California. 



Clroup Lwcipes. 



Anterior tibiaj of elongate triangular, outer margin straight, not den- 

 tate. Thorax bistriate,. outer stria close to the margin and somewhat 

 abbreviated. Epipleurse bistriate, subhumeral short, apical. Antennal 

 cavities shallow. 



H. Isevipes, Germ., Ins. spec. nov. p. 87 ; Lee. Bost. Journ. V., p. 

 50, pi. 1, fig. 7 ; Mars. Mon., 1854, p. 233, pi. 7, fig. 49. 



Elytra with three entire dorsal strise, a very short basal fourth and an 

 almost entire sutural. Subhumeral stria apical, close to the first dorsal 

 and half its length. Propygidium sparsely punctured at the sides, 

 smooth at middle, pygidium convex smooth with a very few punctures at 

 the sides. Legs black, smooth. Length .14-. 18 inch ^ 3.5-4.5 mm. 



Occurs from Pennsylvania to Georgia. 



This species is the only one in our fauna belonging to this group, and 

 may be distinguished from every other by the simple anterior tibiaj. 



Group Sexstriat'us. 



Thoi-ax bistriate, outer stria close to the margin, and abbreviated at 

 each end. Anterior tibite quadridenticulate, apical tooth bifid. Antennal 

 cavities deep, partially enclosed by the prolongation of the sides of the 

 prosternal lobe. Hind tibi;e subtridentate. 



H. sexstriatus, Lee. Ann. Lye. V., p. 1G3 ; Mars. Mon., 1854, p. 290, 

 pi. 8, fig. 86. 



Anterior angles of thorax sparsely and finely j)unctured, more coarsely 



