152 LENG AND HAMILTON. 



IMECAS LeConte. 

 [The species of this genus resemble the smaller Saperdas, but their 

 breeding habits are different, being in the stems of plants and weeds 

 so far as known]. They may be separated by the following table, 

 which is based on that of Dr. Geo. H. Horn, Tr. Am. Ent. Soc. vii ; 

 Blanchard, in Ent. Amer. iii, 86 and Gahan, Tr. Am. Ent. Soc. xv, 

 800: 



Body above concolorous. 

 Legs black ; thorax usually with two feeble callosities; body above uniformly 

 clothed with cinereous pubescence. 



Claws moderately deeply cleft, the inner division acute cana. 



Claws more deeply cleft, the inner division broad and lobe like.inoriiata. 

 Legs black; thorax without callosities; body above sparsely clothed with cine- 

 reous pubescence, thorax at sides and middle, elytra at suture and sides 

 more densely clothed with yellowish white pubescence-iiiargiiiella. 

 Legs, or at least the femora, red. 



Thorax with four or five callosities; surface sparsely cinereo-pubescent, su- 

 ture and margin more densely pergrata. 



Thorax without callosities, surface very sparsely pubescent ; femora red, tibiae 



usually dark feiuoralis. 



Body above bicolored ; head and thorax reddish yellow. 



Elytra very sparsely cinereo-pubescent, suture more distinctly- . -ruficollis. 



M. caiia Newm.. 1840 {Saperda), Ent. p. 12; Sitenostola saturnina Lee, Coleop. 

 of Kansas, 1859, p. 21 (Smith. Cont. xi) ; Tr. Am. Ent. Soc. xv, 300. 

 Length 8-12 mm. = .32-. 48 inch. Habitat. — Kansas, Texas, Florida. 



M. inornata Say, 1824 {Saperda), Jour. Ac. Nat. Sci. iii, 407; Lee, ed. ii. 189: 

 Saperdu cinerea Newm.. 1840, Ent. p. 13; senesceyis Bates, Biol. Cent. Amer. ; 

 Am. Ent. iii, 86 ; Horn, Tr. Am. Ent. Soc. xv, 301. 

 Length 8-15 mm. = 32-. 60 inch. Habitat. — Nevada, Dakota, Colorado, Ne- 

 braska, Wisconsin, Iowa, Missouri, Kansas. Texas, Louisiana. Mexico. 



[J/, inornata % Walsh, Proc. Ent. Soc. vi, 2(54, is Saperda eoncolor. 

 The characters given in the table are the only ones by which this and 

 the preceding species can be separated, otherwise they seem to be 

 identical. 



Bhick, uniforndy clothed above with dense gray pubescence (some- 

 times yellowish); the thorax may have on each side of the disc a 

 round denuded callus, or this may be wanting ; the length is some- 

 times greater than the width, more often the reverse. Caiia was 

 desci'ibed from P""londa, and seems to have been ditlerently colored 

 from the Western form, the pubescence grayish white, the elytral 

 and sutural margins also hoary. These two species greatly resemble 

 Saperda eoncolor, but the antennte are not usually annulate. Inor- 

 nata breeds in the stems of the false sunflower (He/enhuii teniilfo- 

 Ilnm) Schwarz, and in HeUaniliH!^ tuberosm growing wild.] " Ham." 



