128 NORTHERN ZOOLOGY. 



j3. Aposterna. 4 Kirb. 



Family SERICID^. Sericidans. 



LXIX. * Genus CAMPTORHINA. Kirb. 



Labrum transverse, emarginate. 



Mandibles very short, subtrigonal, curving, without teeth ; molary space subtriangular, surface 

 furrowed, the outer margin appearing denticulated from the ridges of the furrows being 

 more elevated there, on the opposite side there appears to be a kind of channel. 

 Maxillce linear, incurved at the tip and terminating in four stout teeth. 

 Labium oblong, forming one piece with the mentum ; narrowed, subemarginate, and sloping inwards 



at the apex. 

 Palpi maxillary, four-jointed, gradually incrassated : first joint very minute, second obconical ; 

 third of the length of the second, thicker; fourth as long as the second and third together, 

 rather oblong. 



labial, three-jointed, filiform : last joint as long as the two first together. 



Antenna nine-jointed: scape much incrassated at the apex; the pedicel less incrassated, spherical- 

 oblong; the two following joints rather filiform; the fifth and sixth shorter and inclining to 

 pateriform ; and the three last elongated and forming a rather slender knob. 

 Body oblong, subcylindrical. Head inserted, subtriangular, with the vertex of the triangle 

 anterior, truncated ; nose short, transverse, distinct, reflexed, separated from the postnasus on each 

 side by a cleft ; nostril-piece inflexed, transverse, and nearly vertical ; postnasus distinct, depressed, 

 curved; front convex; eyes subhemispherical ; canthus septiform : prothorax transverse, with an 

 anterior sinus taken from its whole width to receive the head, posteriorly subrepand : scutellum an 

 isosceles triangle : elytra linear : breast-bones not prominent: medipectus or midbreast elevated: 

 legs thus located ; ; ; tarsi subsetaceous ; claws two, very short, incurved, each bifid or bipartite, 

 with the lobes acute : podex only partly covered. 



This genus is very nearly related to Serica of Mr. W. S. Mac Leay. It differs, however, in 

 the number of teeth that terminate the maxillae, having only four instead of six ; in having both the 

 lobes of the claws that arm the tarsi acute, whereas in that genus the inner one is truncated, and in 

 having none of the silky bloom which the species of Serica usually exhibit. Mr. Mac Leay speaks 

 of its antenna; being ten-jointed, this, if correct, would furnish another striking distinction, but in 

 S. brunnea, the type of the genus, under a very strong magnifier I can perceive only nine joints, 

 and M. Latreille in this agrees with me. 5 



* This tribe is distinguished by having no prominent presternum or mesosternum. 

 Crust. Arachn. et Ins. i, 5G2. Not. 2. 



