1852.) 143 
Coryiopuus Leach. 
Caput thorace obtectum. Antenne 9-articulate, articulis duobus primis 
elongatis crassis, 310 et 4to minutis, 5to elongato, conico, 6t© minuto, tribus 
ultimis magnis, crassitie vix brevioribus; tarsi filiformes, articulo 3i0 non 
recepto, unguiculari longo, unguibus simplicibus. Corpus rotundatum convexum 
glabrum. Ny 
1.°C. marginicollis, rotundatus, niger nitidus, thorace basi obtuse 
producto, lateribus et apice testaceo-marginato, elytris punctulatis, pedibus 
flavis. Long. :03. 
Middle and Southern States, on leaves. Body rounded, convex, shining black. 
Thorax semicircular, margin testaceous, base obtusely angulated in the middle, 
posterior angles obtuse. Elytra strongly punctulate, a little rounded at the 
apex. Legs yellow testaceous. 
2. C. truncatus, rotundatus, piceus, thorace testaceo basi truncato, 
elytris subrugosis vix punctulatis, pedibus flavis. Long. ‘03. 
New York, under stones. Form and size of the preceding. Thorax testaceous, 
sometimes darker on the disk; posterior margin almost straight, posterior 
angles acute a little produced. Elytra scarcely punctured, finely wrinkled. 
Feet testaceous. © 
SERIcopERus Steph. 
Gryphinus Redt. 
Caput thorace obtectum minutum. Antenne 10-articulate, articulis 1 et 2 
crassis, clava 3-articulata. Tarsi filiformes, articulo 3i° minuto, non recepto, 
unguiculari longo. Corpus ovatum convexum, pubescens, thoracis angulis 
posticis productis, elytris postice angustatis apice truncatis. 
The English genus Sericoderus is described as' having the antennal club three 
jointed, but Corylophus too has the same structure, according to British autho- 
rity. (Vide Westwood’s Modern Classif. Insects.) Comparing other characters, 
such as the form of the thorax and elytra, and above all the figure in Shuckard’s 
Illustrations of British Coleoptera, I find no reason why Redtenbacher’s genus 
should be retained ; however, we owe to him the first good description of the 
genus. (Fauna Austr. 573.) 
1.8. flavidus, flavo-testaceus, flavo-pubescens, thorace macula antica 
obscura notato, basi late sinuato, elytris subtilissime punctulatis. Long. -03. 
New York and Lake Superior. Ovate, one-half longer than wide, uniformly 
yellowish testaceous, densely pubescent. Thorax semi-circular, margined, 
with a fuscous spot at the apex; base broadly rounded in the middle, sinuate 
each side, posterior angles moderately produced. Elytra very finely and 
densely punctulate, very slightly narrowed to the apex, which is broadly trun- 
cate. Pectus dusky. 
2. S. obscurus, rufo-piceus, flavo-pubescens, thorace lateribus rufis, 
basi utrinque subangulato, elytris subtiliter punctulatis, apice pedibusque flavis. 
Long. :025. 
One specimen, New York. Smaller than the preceding and a little narrower. 
The thorax is more broadly rounded in the middle, and the posterior angles are 
more produced, forming with the middle of the base a distinct angle. The 
elytra are a little more narrowed behind, and seem more distinctly punctured, 
the truncated margin is yellowish. Beneath dusky, feet and tip of the abdomen 
yellowish. , 
3. S. subtilis, flavo-testaceus, flavo-pubescens, thorace macula antica 
obscura notato, angulis posticis valde productis, elytris punctulatis. Long. -02. 
Illinois, Mr. Willcox. Smaller and more convex than S. flavidus, with the 
thorax not so transverse, and the posterior angles much more produced. The 
elytra are more narrowed posteriorly and more distinctly punctured. The pectus 
is scarcely darker than the abdomen. 
