1852.) 141 
their margin, scarcely extending to the parapleure. Feet rufous. Anus of the 
male broadly emarginate. | 
27. S. punctum, rotundato-ovalis convexus niger, parce pubescens, 
thorace lateribus confertim punctatis, elytris subtiliter parce punctatis, pedibus 
testaceis, femoribus posterioribus piceis. Long. :05. 
Two specimens, North shore of Lake Superior. On account of its size and 
form it resembles the preceding, but the coarsely punctured thorax distinguishes 
it. Rounded oval, convex, shining black, covered with fine and sparse pubes- 
cence. Head obsoletely punctulate, antenne yellow. Thorax finely and 
sparsely punctured at the middle, coarsely and densely at the sides, base 
margined, obtuse in the middle, subsinuate each side. Elytra finely and 
sparsely punctured. Body beneath coarsely punctured, abdominal plates smooth, 
punctured at base, considerably shorter than the segment, not extending late- 
rally to the parapleure. Feet testaceous-yellow, four posterior thighs piceous. 
The following species I have not seen : 
S. ochroderus Muls. var. zanthaspis, Muls. 952. 
S. myrmidon Muls. 954. 
S. icteratus Muls. 969, 
S. Brullei Muls. 954. | 
S. fastigiatus Mauls. 986. 
S. punctatus Mels. Pr. Ac. Nat. Sci. 3, 180. 
S. collaris Mels. ibid., is probably one of the species in B—2—d, but 
the description is not sufficiently definite to permit its determination. 
Div. 2. Corylophi. 
This division contains very small species, most of which are remarkable for 
having the thorax produced in front above the head, as in Cassida, or Cossy- 
phus. They differ in their habits from the genuine Coccinelle, most of them 
being found in putrid vegetable matter. At times they are found flying about 
at twilight in great numbers. 
Redtenbacher has founded upon these insects his family Clypeastres, con- 
sidering the narrowness of the second tarsal joint and the hood-like form of the 
thorax as sufficiently important to separate them. The mandibles are usually 
crenate internally, but according to Erichson there is a gradual transition from 
that form to the simple mandibles of many Coccinelle. The hood-like form of 
the thorax can also be of but little importance, since in the genus Orthoperus, 
which evidently belongs with Corylophus, this anterior prolongation is wanting. 
We have thus left only two characters, the narrow tarsi, and the ciliated wings, 
which however useful for systematic division, seem to be rather slight charac- 
ters for the establishment of anatural family. In the genus Rypobius the tarsi 
are also considerably dilated. For these reasons I have followed Erichson in 
uniting these genera with the Coccinellide, establishing however a special 
group under that family for their reception. Clambus must be absolutely 
excluded from the Coccinellide, since the peculiar laminated structure of its 
posterior coxa is entirelv without analogy in this tribe, and is found only in the 
singular genus Spherius, placed by Erichson among the Trichopterygia. 
I have but one new generus to add to this group. ‘Those found in the United 
States are thus related. 
1. Caput liberum. 
Antenne 9-articulate, tarsi dilatati, : . 5 - Ryposrus Lec. 
Antenne 9-articulate, tarsi angusti, : ° ° - Ortnorerus Steph. 
1. Caput obtectum, tarsi angusti. 
Antenne 9-articulate, corpus rotundatum, glabrum, - Coryxuopuus Leach. 
Antenne 10-articulate, elytra truncata, . : ° » SERICODERUS Steph. 
Antenne 11-articulate, corpus ellipticum, pubescens, -. Sacium Lec. 
22 
