12S4 FAMILY LVn. — LAGRIin.T,. 



Family LVII. LAGIillD.E. 

 The Lageiid Bark Beetles. 



This family comprises a few elongate, slender beetles, having 

 the thorax subcylindrical, narrower than elytra and the color more 

 or less brassy or bronzed. Frojn the Tenebrionidse, to which they 

 are closely related, they are separated only by having the front 

 eoxaj m\ich more prominent and the next to last joint of tarsi 

 dilated and spongy beneath. They occur beneath bark and on 

 leaves, the larvffi feeding freely on foliage and being much less retir- 

 ing in habits than those of the Tenebrios. 



In addition to the characters mentioned, the Lagriidae have the 

 head prominent, horizontal and more or less constricted behind the 

 eyes, which are transverse, emarginate and rather coarsely granu- 

 late; antenniE 11-jointed, nearly filiform and inserted under very 

 small, oblique frontal ridges, the terminal joint as long as the three 

 to five preceding together; front coxal cavities closed behind; ely- 

 tra rounded at tips, covering the abdomen, which, in our genera, 

 has six ventral segments visible; legs slender, the next to the last 

 joint of all the tarsi dilated, emarginate and clothed beneath with 

 a dense bunch of hairs; tarsal claws simple. But eight species of 

 the family are recognized from the United States. These are dis- 

 tributed among two genera and are treated in the single paper : 



Horn. — "Miscellaneous Coleopterous Studies — Lagriida^, " in 

 Trans. A)ner. Ent. Soc, XV, 1888, 28-32. 



KEY TO THE GENERA OF LAGKIID^. 



a. Head not constricted to a neck; el.vtr.i very coarsely punctate, without 

 definite stri;e : eyes transverse, reniforin, not prominent 



I. Abtheomacea. 



nu. Head constricted beliind the eyes; elytra distinctly striate; eyes large, 



convex and prominent. II. Statira. 



I. Arthromacea Kirby. ]837. (Gr., "a joint -f long.") 

 This genus, sufficiently characterized in the key, is represented 

 in the State by two species. 



2:',T7 (7G37). Arthromacha /ENea Say. Long's Exped., II, 1824 -^87 ■ ibid 

 II, 191. 

 Elongate, slender. Body lieneath and legs dark bronze; surface above 

 brilliant metallic blue, green, ciipredus or dark bronze; autennte reddish- 

 brown, the terminal .ioint usually darker; tarsi pale. Thorax cylindrical. 

 oiu>third longer than wide, without side margins or angles; surface, as well 

 as that of head, co.-irsely and rather closely punctate. Elytra parallel on 

 basal lialf, then feebly but dislinclly widened to apex; surface coarsely 

 closely and rugosely punctate, witli vague stria; ,.nly on api.'al third. Ix^ngth 

 9.5-1.3.5 mm. 



