SYNOPSIS OF THE LAMIIN.'E. 117 



Thorax irregular, but witliout denuded spaces or lines. 



terrspcolor. 



Thorax with median, fine carina denuded at apex, a short ob- 

 lique line on each side at apical margin, often denuded. 



argeiitntuN. 



Elytra with asperities well marked, either as acute tubercles or 



ridges: antennje scarcely longer than the body, even in the 



male; joints three and four together equal in length to 5-8 



taken together. 



Hind trochanters of % prolonged into a short, but acute spine. 



a<*iilif'er. 

 L. avulit'er Say, 1823 (Lamia), Jour. Am. Phil. Soc. iii, 329; Lee, ed. ii, ISO; 

 Amnisciis ucuUfera Hald., Tr. Am. Phil. Soc. x, 47: A. albescens Hald., 1. c. 

 46; .1. marginellns Hald., 1. c. 47; A. asperatus Hald., 1. c. 46; Lee, Jour. 

 Ac. Nat. Sci. ser. 2, ii, 168; tuherculatus Frolich, Naturf. 29, 1832, p. 123, 

 pi. 3, fig. 13; Uhler, Patent Office Kep. 1860, p. 319. 

 Length 7.5-10 mm. : .40 inch. Habitat. — Canada. Massachusetts. New York, 

 New Jersey, Pennsylvania, Ohio, West Virginia, District of Columbia, Vir- 

 ginia. Florida, Texas, Arkansas, Missouri, Kansas, Nebraska, Wisconsin, 

 Illinois. 



[A robu.st, easily recognized species, surface blackish bri)\vn, with 

 prostrate cinereous pubescence, a whitish band behind the middle, 

 broad at the suture, but narrowing to a point toward the sides, be- 

 hind which the surface is conspicuously fuscous. Frequently the 

 basal two-thirds of the elytra is clothed with grayish white pubes- 

 cence with a marginal streak fuscous from denudation ; the asperi- 

 ties mentioned in the table are black and conspicuous. The color 

 and markings are very variable as indicated by the synonymy. 



Breeds in a variety of trees either diseased or recently cut, seldom 

 in old timber; the larvae mine under the bark, as do those of many 

 of its congeners ; I have found it in oak, apple, sycamore {Phdanus), 

 which is its natural food-plant (Uhler). Kiley, on osage orange.] 

 " Ham." 



Ii. argeiifatiis Duval, 1857, Ramond de Sagra, Hist. Cuba, vii, p. 273; Chev- 

 rolat, An. France, 1802, ser. 4, vol. ii, p. 247; Amuiscus Dej., Cat. ; Lee. (the 

 genus), .Jour. Acad. Nat. Sci. ser. 2, ii, 168 ; Horn, Tr. viii, 120. 

 Length 9.5 mm. ; .38-.44 inch. /fa6»<a<.— Southern Florida, Nassau, N. P., Cuba. 



[Form more elongate, more convex auvl with longer antenuic than 

 in aculifer ; there are no denuded asj)erities, and the hind trochanter 

 of the male is not spiniform ; clothed with silvery white pubescence, 

 a slight cloud at the sides of the elytra, a short dark fascia at the 

 declivity, four rows of feebly elevated pubescent tubercles on each, 

 the apices emarginately truncate with the outer angle acute ; the 

 thorax is uneven with several tuberculoid elevations, uniformly pu- 



TRANS. AM. ENT. SOC. XXIII. APRIL, 1896. 



