BEETLES. 



325 



tliis family. Thiei' sub-tMiuilies art easily iccugiiizalile ; the highest, the Prioiiinse, 

 Iiave the prothorax margined ami the labviun connate; the other two sub-families, the 

 Cerambycirue and Lamiina', have the labriim free and the jirothorax without margin. 

 The Lamiin* have, liowevei-, an oblique groove on the inner side of the front tibiae, 

 while the front tibia' of the Cerambycina> are not grooved. 



Of tlie T.amiina', the genus Sapenlu is ]ierha]is Ix'St known. The species are 

 nearly cylindrii'al ; tlie prothorax is cylindrical with no spines .at sides. The elytra 

 are a little wider than the jirdtliorax, distinctly sli(Uildered, and cover the entire 

 abdomen ami the well-develojied wings. The legs are of moderate length, and are 

 armed with claws wliicli point outward at right angles to the tarsus. The claws 

 are simple, except sumetimes the outer one of the .-interior and middle tarsi of males 

 of certain s)iecies. 



Fig. aGO. — Loiigicorii heeties. a, Saptrda carcliarinii ; It, S. pojmiineaf- c, Acauthocinus ferfi/is, male; 



d, female; c, Linnia tuxtor. 



Saperda hivittnto is from (I. .5;"! to O.To of an inch long, is wldte beneath, with white 

 face and antemue, ami with t w<i u bite longitudinal strijies al)ove ; tlie rest is light brown. 

 It is fiiunil, in June and .luly, about .apple, quince, mountain ash, (horn, shadduish, and 

 other rosaceous trees, in the wood of which its larvie feed. The beetle is nocturnal, 

 remaining concealed by day and feeding liy night, as is the case with .all s]iecies of 

 Saperda. The imago eats tlie leaves of the same kinds of trees of which the larv;v 

 eat the wood. The egg of S. hlrUtiita is laid in a cleft made by the female in the 

 bark of the tree ; after depositing it the female fills the cleft with a cement like secre- 

 tion. The young larvae bore into the trees, and where numerous tlie\ do much damage 

 to apple-trees. The larva' are legless, nearly cylindrical, the first segment behind the 

 head being largest, the succeeding ones gradual! \ narrower; the head is small, horny, 

 and brownish. T. W. H.arris writes that the Larval slate lasts two or three years, and 

 that the larva penetrates during that time "eight or ten inches upwards in the trunk 

 of the tree, its burrow at the end .iiiproaching to, and being only covered by the bark. 

 Here its transformaticjn takes place." Pupation lasts a month or two. 



