112 [October, 1S44 



edges ; a very obsolete mesial line : elytra crenate-striate, the interstices trans- 

 versely wrinkled : beneath dark rufous : feet lighter. 

 Cigones, Curtis. 



C. rnarginalis. Brunneous above ; lateral thoracic margins and body beneath 

 dull rufous.— Ih I. long. Pennsylvania. 



Lyctus rnarginalis, Melsh. Catal. 



Dark brown above, densely hispid : head small, tinged with rufous, finely 

 granulated, plunged to the eyes into the emargination of the thorax : antenna? 

 piceous, the capitulum rufous and pubescent at tip: thorax widely and profoundly 

 emarginate at apex, with the lateral margins dull rufous, widely depressed and 

 slightly rounded ; anterior angles prominent, acute ; posterior ones faintly round- 

 ed ; surface finely granulated ; lateral edges ciliated : scutellum punctiform : ely- 

 tra obsoletely maculate with dull rufous; lateral edges similarly colored ; finely 

 crenate-striate, the interstices somewhat obsolete, with ranges of short, robust 

 sets : feet and beneath dull rufous. 



Xylotrogus, Stephens. 



1. X. brevicornis. Badious : antenna short, robust. — 1^ 1. long. Pennsyl- 

 vania. 



Lyctus americanus, Melsh. Catal. 



Head blackish, inequal, deeply and widely impressed each side between the 

 antennae; strongly punctured : antennae piceous, robust, short, 11-jointed, joints 

 2 — 9 transverse, equal, compact ; two last joints slightly thicker than the pre- 

 ceding ones, separate ; terminal joint obtuse : thorax blackish, glabrous, subquad- 

 rate, scarcely narrowed at base ; angles acute ; transversely impressed behind the 

 middle ; surface with large and profound punctures, with a narrow, impressed 

 mesial line : scutel minute, blackish : elytra chestnut, deeply striate, stria; with 

 transverse punctures, the interstices very fine, with the sutural one remotely and 

 minutely punctured ; apical edge slightly reflexed: beneath strongly punctured, 

 dark chestnut: feet similarly colored. Closely allied to Lyctus reJlexus,Say, 

 but the outlines of the thorax are different. 



2. X. parallelipipedus. Fuscous ; feet rufo-testaceous. Less than 1$ 1. long. 

 Pennsylvania. 



Lyctus parallelipipedus 1 Melsh. Catal. 



Elongate, subparallel, dull reddish-brown, densely and very minutely punc- 

 tured, finely golden pubescent : head in front and mandibles rufous : antennae?: 

 eyes black : thorax subquadrate, convex, somewhat longer than wide, slightly 

 narrowed at apex, which is slightly advanced, and obtusely rounded in the middle; 

 anterior angles subacute ; basal edge slightly bisinuate ; sides almost rectilinear : 

 scutel minute, transverse : elytra convex, nearly three times longer than the tho- 

 rax, with the sides subparallel; apex obtusely rounded: beneath chestnut, glab- 

 rous; feet paler. 



Lyctus, Fabr. 



L. striatum Reddish-brown, pubescent ; elytra feebly punctate-striate.— 2-2f 

 1. long. Pcnnsylvauia. 



