94 [May, 
Var.? Entirely testaceous, witha marginal fuscous spot at the middle of each 
elytron. Ihave only a single specimen of this, which is possibly a distinct 
species; it is less elongated, and the elytra are broadly truncate at the tip. 
9. N. bifasciatus, elongatus, fuscus, thorace globoso, cornu vix serrato, 
crista subito elevata, elytris subtilissime punctulatis, nigris, fasciis duabus 
cinereis ornatis. Long. -13—-16. | 
Monocerus bifasciatus Lec. Journ. Ac. Nat. Sc. New Ser. i. 89. 
Western States and Upper Mississippi. The feet are either fuscous or ferru- 
ginous; the thorax is sometimes rufous; the elytra are rounded at the tip in 
both sexes; the anterior fascia is broad and situated at the anterior fourth of the 
length of the elytra, the second is narrow and placed one-third from the apex. 
10. N. bicolor, elongatus, obscurus, pedibus thoraceque lete rufis, hoc 
cornu serrato, crista lata sensim elevata, elytris opacis cinerascentibus, subti- 
liter punctulatis. Long. -13. 
Ferte Anthic. 53. 
Anthicus bicolor Say, Am. Ent. i. pl. 10. 
Monocerus bicolor Lec. Journ. Ac. Nat. Sc. N. Ser. 1. 90. 
Common in the Middle and Southern States. The thorax is subglobose; the | 
horn wider than usual, strongly serrate; the crest is wide, rises gradually, and 
is margined on the sides and apex, which is rounded. 
Species unknown to me: 
11. N. Pilati, Ferte Anthic.'297. Texas. 
12. N. planicornis Ferte Anthic. 39, fig. 8. Very distinct by ae absence 
of the crest of the horn. 
13. N. talpa Ferte Anthic. 50. 
14. N.elegantulus Ferté ibid. 52. These are both.from California. They 
appear to be allied to N. bifasciatus. 
Tomoperus Ferté. 
This genus is distinguished by its submoniliform antenne, and clavate femora ; 
the fourth joint of the tarsi is bilobed as in Anthicus. 
1. T. interruptus, parce pubescens, thorace medio valde constricto, 
lobo anteriore latiore, transverso, elytris confuse punctatis, punctis pone medium 
subtilioribus. Long. -11. 
Ferte Anthic. 97. 
Middle and Southern States, varies from black to brown; usually dark brown, 
with the posterior part of the elytra black. 
2. T.constrictus, parce pubescens, thorace medio valde constricto, lobo 
anteriore latiore subtransverso, elytris antice seriatim grosse punctatis, pone 
medium obsolete punctulatis. Long. -12. 
Ferté, Anthic. 101. 
Anthicus constrictus Say, Journ. Ac. Nat. Se. 3, 244. 
Southern States; the obsolete punctures of the posterior part of the elytra is 
the only character for separating this species from the preceding, in which the 
punctures frequently show a tendency to form series. I am very doubtful 
whether they should be considered distinct. 
Formicomus Ferté. 
Formicilla Lec. 
This group is only separated from genuine Anthicus by the oval, convex elytra 
without distinct humeri,and by its more strongly clavate femora. I have placed 
it in brackets to signify ‘that I do not adopt the name. 
1, A.scitulus, apterus, rufo-testaceus, nitidissimus, thorace elongato, 
