THE SKIN BEETLES. 



f)S!) 



aa. Tarsi simple; front coxal cavities open behind; tarsal claws simple. 



b. Head without a simple eye or ocellus on the front; length IS or 



II. Dermestes. 



more mm. 



hi). Head with a distinct ocellus; length not over 5 mm., usually less. 

 c. Body either pubescent or covered with small scales; prosternum 

 visible between the front coxae. 

 d. Antennal grooves wanting; basal joint of hind tarsi much shorter 

 than second; middle- cox;e narrowly separated. 



e. Antenna; ll-jointed; hind coxal plates narrow; mesosternum 



deeply emarginate in front. HI. Attagenus. 



ee. Antennae 9-jointed ; hind coxal plates short and wide; meso- 

 sternum sulcate its full length. IV. Dearthrus. 

 dd. Antennal grooves or pits distinct ; basal joint of hind tarsi but 

 little shorter than the next two combined ; middle coxa- widely 

 separated. 



f. Body pubescent. 



g. Antenna; stout, subserrate, the club 6- to 8-jointed in male. 

 4- jointed in female ; mandibles and labrum not covered by 

 prosternum in repose. Y- Trogoderma. 



gg. Antenna* with a large -compact 2-jointed club, received in a 

 deep pit beneath side margin of thorax ; mandibles cov- 

 ered, labrum not covered by prosternum. 



VI. Cryptorhopalum. 

 ff. Body covered with small scales; antennal club received within 

 a deep pit at the apical thoracic angles. VII. Anthrenus. 

 cc. Body glabrous; the mouth in repose covered by front legs; pro- 

 sternum not visible between the front coxa;. VIII. Orphilus. 



I. Byttjrus Latr. 1796. 

 — 7^-<^^x\ Head very large, front as wide as long with- 



^^-^^^XX out ocellus ; eyes prominent, coarsely granulated ; 



P antennae ll-jointed, club 3- jointed, not received 

 Fig. 22i. Tarsus of Byturw ■ - t grooves: scutellum large, quadrate. 



showing lobes of tarsal joints 111 pw^vi. 5^«v , o j. 



and basal tooth of claw. (After g p ec i es QCCUrS ill the State. 



1123 (3416). Byturus unicolor Say, Journ. Phil. Acad. Nat. 

 Sci., Ill, 1S23. 197; ibid. II, 126. 

 Oblong-oval, convex. Uniform reddish-yellow or pale brown, 

 rarely piceous. thickly clothed with flue, paler silky pubescence. 

 Thorax one-third wider than long, coarsely and densely punc- 

 tate ; sides regularly curved, margins broadly depressed, base 

 slightly broader than apex. Elytra three times as long as wide, ^ 

 rather coarsely and densely punctured. Length 3.7-4.5 mm. Fig 2 22. 



(Fig. 222.) (After Forbes.) 



Throughout the State; frequent. May 16-July 6. Occurs on 

 the flowers of blackberry and raspberry, on which it feeds. The 

 fruit is also often infested with the larva, a small white worm known 

 as the "raspberry fruit worm," which clings to the inside of the 

 berry. 



±6 



