MACROBASIS. 397 
3. Macrobasis albida. 
Lytia albida, Say, Journ. Acad. Phil. iii. p. 305 (1823)'; Amer. Ent. 2nd edit. i. t. 3 (1824)’; 
Complete Writings, i. p. 6, and ii. p. 170°. 
Macrobasis albida, Horn, Proc. Am. Phil. Soc. xiii. p. 89; Dugés, An. Mus. Michoacano, ii. 
p. 57°. 
Lytta luteicornis, Lec. Proc. Acad. Phil. vii. p. 84°. 
Hab. Norra America!??, Texas‘, Laredo *—Mexico (coll. F. Bates), Huasteca 
Potosina (Dugés >), Orizaba (Sallé)y p 1. Ww. Reralac \W YOu 
A large species, thickly clothed with fine cinereous or fulvo-cinereous pubescence, the 
prothorax usually with a fine blackish streak on either side of the middle of the disc. 
The basal joints of the antenne are rufo-testaceous; the first joint in the male is curved, 
as long as the next four united, and deeply emarginate on the inner side before the 
apex. ‘The anterior tibiz have two spurs, and the first joint of the anterior tarsi is very 
much longer than the second, and undilated, in the male. Abundant in Texas. 
4. Macrobasis longicollis. 
Lytta longicollis, Lec. Proc. Acad. Phil. vi. p. 343°. 
Macrobasis longicollis, Horn, Proc. Am. Phil. Soc. xin. p. 90°; Trans. Am. Ent. Soc. xii. 
p. 110°. 
Lytia sublineata, Lec. Proc. Acad. Phil. vi. p. 447 *. 
Macrobasis sublineata, Horn, Proc. Am. Phil. Soc. xii. p. 94°; Trans. Am. Ent. Soc. xii. 
p. 109°. 
Hab. Norta America!, Texas? 45, Arizona ?, and New Mexico ?.—Mexico, Northern ° 
Sonora (Morrison). 
Three male examples of this species were sent us by the late Mr. Morrison as from 
Sonora. It differs from I. albida in having the basal joint of the antenne very feebly 
sinuate on the inner side before the apex, and in having only one spur to the anterior 
tibiee, in the male sex. 
5. Macrobasis purpurea. (Tab. XVIII. figg. 17,3; 17a, antenna, ¢.) 
Macrobasis purpurea, Horn, Trans. Am. Ent. Soc. xii. pp. 108, 110°. 
Moderately elongate, pitchy-black, finely and rather sparsely pubescent; the head with the sides, the anterior 
portion, a median stripe, and the occiput, the prothorax with the sides, a rather broad median stripe, the 
apex narrowly, and the basal margin, the scutellum, the elytra with the suture, apex, and lateral margin 
very narrowly, and a rather wider stripe on the outer portion of the disc extending from the base nearly 
to the apex, cinereo-pubescent, the rest of the pubescence purplish-black ; beneath uniformly cinereo- 
pubescent. Head large, with a small flavous oblong spot between the eyes, closely and finely punctured, 
with a fine median groove, the epistoma sharply separated from the front; palpi and antenne brownish, 
the latter very long, setaceous, and moderately slender; prothorax narrower than the head, not so long as 
broad, rounded at the sides anteriorly, and slightly sinuous before the base, the disc with a fine, smooth, 
well-marked median groove, which, towards the apex, becomes shallower and wider, the surface closely 
and finely punctured; elytra moderately elongate, not much wider than the head; beneath very closely 
punctured ; legs obscure brownish. 
