6 AMEKICAN ENTOMOLOGY. 



seem to have the habit of Lytta, combined with a form of antennae 

 allied to that of Mylahrh. 



They cannot be referred to Zonith, as the palpi are not filiform, 

 and the habit does not agree. 



The NuttaUii seems to be limited to the western region. In 

 company with Major Long, I observed it, for the first time, near 

 the base of the Rocky Mountains. A very numerous flock had 

 there taken possession of the few diminutive bushes that occurred 

 within the space of a hundred yards, every spray of which was 

 burdened with their numbers. After passing this limited dis- 

 trict, not an individual was seen during the remainder of our 

 journey. On the recent expedition of the same officer to the 

 river St. Peter, I obtained but a single specimen, which was found 

 one evening at an encampment in the North West Territory. 



The upper left figure, natural size. 



Lytta albida. — Specific character. Black, covered with 

 dense whitish hair. 



L. albida nobis, Jour. Acad. Nat. Sciences, vol. iii. p. 305. 



Desc. Body black, entirely covered by dense, short, prostrate 

 greenish or yellowish-white hairs ; head with a longitudinal im- 

 pressed line; antennse subglabrous; first and second joints 

 rufous, the latter nearly equal in length to the third joint; cly- 

 peus, labrum, and palpi pale rufous ; tarsi black. 



Ohs. Another remarkably fine species, which I discovered 

 within about a hundred miles of the Rocky Mountains, during 

 the progress of Major Long's expedition over that vast desert. 

 It appeared to be feeding upon the scanty grass, in a situation 

 from which the eye could not rest upon a tree, or even a humble 

 shrub, throughout the entire range of its vision, to interrupt the 

 uniformity of a far outspreading, gently undulated surface, that, 

 like the ocean, presented an equal horizon in every direction. 



The upper right figure natural size. 



Lytta maculata. — Specific character. Black, covered with 

 cinereous hair ; elytra spotted with bl^ck. 



L. maculata nobis. Jour. Acad. Nat. Sciences, vol. iii. p. 398. 



Desc. Body black, invested with cinereous, prostrate hairs; 

 head with an impressed, longitudinal line; antennae, joints cylin- 

 drical, and with the labrum and palpi glabrous : maxillary palpi 

 much dilated at tip ; eyes elongated, retuse behind the antennae 



