1853.] 345 
elytra are more distinct and not very dense. The anterior tarsi of the male are 
dilated as in the preceding. 
Nemoenatua J//. 
Our species are much more numerous than commonly supposed, and from the 
strong resemblance in appearance one might be tempted at first to consider 
many as mere variations in color. As will be seen in the sequel, however, the 
differences are organic, and the species may be grouped in a manner very simi- 
lar to that employed under Lytta. Division (B) seems to correspond with 
Kirby’s genus Grathiwm, but I can find no character sufficiently important to 
entitle it to rank with the other genera of the family. 
A. Maxille valde elongate. 
a. Tibie postice calcaribus duobus latis obtusis : SS Dewilte 
b. Tibiz postice calcari altero crasso obtuso, altero tenui. Sp. 2-—5. 
c. Tibiz postice calearibus duobus tenuibus : 
* Calcari externo Jatiore apice retundato ° ° - Sp. 6—10. 
** Calcaribus duobus acutis : ‘ : : - Sp. 11—16. 
B. Maxille corpore multo breviores; ore valde attenuato. 
d. Elytra nitida, parce punctata : ° - 0 - Sp. 16—17. 
e. Elytra scabro-punctata . ; - ° : - Sp. 18—21. 
A.—a. 
1. N. bicolor, nigra, breviter nigro-villosa, capite thoraceque rufis confer- 
tim punctatis, hoc transverso, elytris subtiliter confertim punctatis. Long. °45. 
Missouri Territory. Head triangular, rufous, densely and strongly punctured, 
villous with short black hair; clypeus, labrum and organs of the mouth black. 
Antenne black, 2d joint two-thirds as long as the 3d. Thorax rufous, wider 
than the head, one half wider than long, slightly narrowed in front, sides 
straight, angles rounded, disc villous and densely punctured like the head. Scu- 
tellum black. Elytra black, more densely and finely punctured than the head 
and thorax, and in like manner villous with black hair. Beneath black; spurs 
of the posterior tibie flat and obtuse, the outer one a little broader. 
A.—b. 
2. N. lurida, luteo-testacea, parce flavo villosa, thorace transverso, confer- 
tim punctato, subcanaliculato, lateribus antice rotundatis, elytris subtilius con- 
fertim punctatis, antennis palpis tibiis tarsisque nigris. Long. -55. 
Missouri Territory, on Platte River. Brownish yellow, sparsely clothed with 
fine yellow hair. Head triangular, closely punctured, maxille, palpi and tip of 
the mandibles black; antenne black, 2d joint half as long as the 3d. Thorax 
one half wider than long, slightly narrowed anteriorly, and rounded on the sides; 
closely punctured, obsoletely channeled behind the middle. Scutellum finely 
punctured, impressed. Elytra finely and tolerably densely punctured. Beneath 
yellow, femora slightly fuscous at tip; tibize and tarsi almost black; posterior 
tibia with the outer spur thick, cylindrical and concavely truncate at tip; inner 
one very small, flat, rounded at tip. 
A specimen from Texas agrees in form with those from Missouri Territory, 
but the body is darker beneath, and the hairs of the upper surface are appa- 
rently black; it very evidently does not belong to the next species, from which 
it differs both by the form of the thorax and the yellow femora; the specimen is 
so imperfect that I cannot point out any other differences. 
3. N.apicalis, luteo-testacea, nigro-villosa, thorace punctato, transverso, 
lateribus antice rotundatis, elytris subtilius confertim punctatis, apice nigri- 
cantibus, scutello, antennis, palpis, pectore abdominis basi, pedibusque nigris. 
Long. -4—:5. 
Two specimens from Benicia, California, and one from Texas, collected by 
Mr. Lindheimer. Differs from N. lurida by the black villosity, as well as by 
the arrangement of colors; the thorax is scarcely wider than long, and is more 
