NEMOGNATHA. 375 
the under surface, legs, scutellum, and elytra black. NV. decipiens is stated by its 
author? to be a variety of WV. lurida; if this is the case, Leconte’s description ® of the 
posterior tibial spurs of NV. decipiens is inaccurate. In WV. lurida the outer spur of the 
posterior tibic is exceedingly stout, broad, and truncate at the apex, and the inner one 
is short and small. Amongst the large number of specimens collected by Hoge at 
Villa Lerdo, there are several with the elytra entirely piceous. The general colour 
is fulvous. 
3. Nemognatha lutea. 
Nemognatha lutea, Lec. Proc. Acad. Phil. vi. p. 346*; Trans. Am. Ent. Soc. viii. p. 213’. 
Nemognatha pallens, Lec. loc. cit. p. 346°. 
Hab. Nortn America, Missouri!, Kansas?, Montana?, Colorado?, California ? 3, 
Texas ?.—Mexico, Northern Sonora (Morrison). 
A single specimen from Sonora apparently belongs to this species. It differs from 
N. lurida in the much sparser punctuation of the thorax, and in having the outer spur 
of the hind tibiz narrower. The legs are entirely testaceous, and the thoracic pubes- 
cence is yellow. 
4, Nemognatha piezata. 
Zonitis piazata, Fabr. Ent. Syst., Suppl. p. 104°. 
Zonitis piezata, Weber, Obs. Ent. p. 60°. 
Nemognatha piezata, Lec. Proc. Acad. Phil. vi. p. 847°; Trans. Am. Ent. Soe. viii. p. 213%. 
Zonitis vittata, Fabr. Syst. Eleuth. ii. p. 24°; Coqueb. Ilustr. Icon. Ins. ii. p. 128, t. 29. fig. 5°. 
Nemognatha texana, Lec. Proc. Acad. Phil. vi. p. 3477. 
Hab. Norta America, Carolina!5®, Georgia®, Atlantic region to California and 
Montana 4, Texas 7.—Mexico (Sallé), Jalapa (Sallé), Atoyac in Vera Cruz (H. H. Smith). 
I refer three examples from Mexico to this species. One, a male, from Jalapa, is of 
a ferruginous colour, with a broad black median vitta on each elytron, the under 
surface and femora reddish-testaceous, and the tibiee and tarsi in great part piceous. 
The two others, females, are of a uniform reddish-luteous or luteous colour above, with 
the under surface, tibiee, and tarsi more or less infuscate. The vittate form agrees well 
with typical V. piezata from Texas; the unicolorous ones with Leconte’s var. ¢exana, 
of which I also have Texan examples before me. 
In the male of this species the fourth and fifth ventral segments are deeply excavate 
along the middle, the concave portion being densely clothed with fine pubescence; the 
sixth segment, as usual, is cleft down the middle, and broadly and deeply excavate 
in the centre. ‘The spurs of the hind tibie are moderately stout and obtuse, the outer 
one a little stouter than the other. According to Leconte, WV. dicolor, NV. discolor, and 
N. palliata, Lec., are probably nothing more than varieties of WV. piezata. The only 
