346 [JUNE, 
coarsely punctured; the elytra are blackish towards the apex. The spurs of 
the posterior tibiz are as in the last species. 
One of the California specimens has the abdomen entirely black. 
4. N. pallens, pallide flava, antennis tarsisque nigris, thoraee transverse, 
parce punctato, lateribus antice rotundatis, elytris minus dense subtilius punc- 
tatis breviter flavo-pubeseentibus. Long. 36. 
One specimen from Vallecitas, in the southern part of California. This spe- 
cies is sufficiently distinct by the diagnosis given- I will merely add that the 
head is slightly fuscous; the apex of the mandibles and palpi is black; the first 
joint of the antenna is yellow, the rest are black, the 2d is one half the length 
of the third; the spurs of the posterior tibiw are as in the two preceding. 
5. N. lutea, luteo-testacea, thorace transverso, lateribus antice rotundatis, 
parce punctato, elytris confertim punetatis flavo pubescentibus; subtus plus 
minusve infuscata, antennis tarsisque nigris. Long. -4—-5. 
Missouri Territory,eommon. Head triangular, moderately punctured, sparsely 
pubescent with yellow hair; mandibles, palpi and maxillx black ; antenne black, 
2d joint two-thirds as long as the third. Thorax transverse, rounded on the 
sides anteriorly ; dise polished, very sparsely punctured. Scutellum sometimes 
dusky. Elytra densely somewhat rugosely punctured, pubescent with short 
yellow hair. Body beneath fuscous, anterior and middle thighs, and tip of the 
abdomen yellow ; tarsi black; posterior tibize with the outer spur Jess thick 
than in the preceding species; inner spur nearly as long as the outer one, slender 
flattened, rounded at tip- 
A.—c*. 
6. N. dichroa, supra luteo-testacea, thorace transverso, lateribus antice 
rotundatis, parce punctato, elytris minus subtiliter sat dense punetatis, scutello 
antennis corpore subtus, pedibusque nigris, ano luteo. Long. °38. | 
One specimen from Oregon, Col. M’Call. The pubescence has been entirely 
removed by alcohol. This species very much resembles the preceding, but the 
punctuation of the elytra is coarser, and the legs are entirely black. It forms, 
with the next species, a transition between the two groups; the outer spur of 
the posterior tibia, though cylindrical and obliquely truncate, is very little 
thicker than the inner spur. 
7. N. dubia, nigra, nigro-pubescens, thorace modice transverso, antice vix 
ae et lateribus rotundato, parce punctato, elytris rugose punctatis. 
440NQ. °4. 
Variat thorace capiteque lete fulvis. Long. °35. 
Benicia, two specimens. This species closely resembles the preceding, but 
the color is very different, the elytra are more finely punctured, and distinctly 
rugous. The specimen having red head and thorax, may eventually prove to be 
a distinct species; the thorax is not narrowed anteriorly in it, and therefore ap- 
pears more quadrate. The outer spur of the posterior tibiz is slender, cylin- 
drical, and truncate obliquely. f 
8. N. palliata, nigra, nigro-villosa, supra fulvo-testacea, thorace transverso, 
sat dense punctato, antice subangustato, lateribus rectis, elytris subtilius punc- 
tatis, vitta utrinque lata scutelloque nigris. Long. °5. 
One specimen from the upper Mississippi. In the form of the thorax this 
species resembles of the preceding only N. bicolor; the apex is, however, 
more oblique each side. Body and all the appendages black: above reddish 
testaceous, with short black hair: head triangular, not elongated, tolerably 
densely punctured ; thorax one half wider than long, slightly narrowed anteriorly, 
sides not rounded; apex oblique each side, so that the anterior angles although 
obtuse and rounded, are distinct : disc moderately punctured, slightly channeled 
behind the middle. Scutellum black, punctured. Elytra finely punctured, with 
a broad discoidal black vitta reaching from near the base to the apex. Antenne 
with the 2d joint three fourths the length of the 3d; posterior tibia with the 
outer spur flat, a little broader than the inner one, and obtuse. 
