r 



SYNOPSIS OF THE LAMIIN^E. 151 



[Piceous, rather coarsely i^unctured, pubescence gray, very incon- 

 spicuous above and niixe<l with sliort, semi-erect liairs ; the sutnral 

 scarlet line mentioned in the table is oftener absent than present. 

 Breeds in hickory, elm, and in witch hazel (^Almis serrulata).'\ 

 " Ham." 



S. ptiiK'tirollis Say, 1824, Jour. Ac. Nat. Sci. iii, 406; Lee. ed. ii, 188; Lee. 

 Jour. Ac. Nat. Sci. ser. 2, ii, 164; Randall, Bost. Jour. ii. 43. 

 Leugth 9-10 mm. = .37-. 40 i7ich. Habitat. — Massachusetts, New York, New- 

 Jersey, Pennsylvania, Ohio, Louisiana, Arkansas, Kansas, Nebraska. 



[Piceous, pubescence gray and not dense ; the head, thorax, mar- 

 gins of the elytra and a broad sutural stripe are clothed with dense, 

 bright yellow pubescence ; a round frontal spot, one on the occiput, 

 four })laced quadrangularly on the disc of the thorax and one on 

 each side, black from denudation. This species breeds in the poison 

 ivy {Klius rudican.i), and may be taken during a few days about the 

 middle of June.] " Ham." 



S. iii<B«ita Lee, 1850, Agass. Lake Superior, p. 234 ; Can. Ent. vi, 61. 



Length 8-9 mm. = .32-. 36 inch. Habitat. — Lake Superior, Canada, Michigan, 

 New York, Pennsylvania, Ohio, Oregon, California. 



[Readily known by the characters in the table ; there is on the 

 thorax two gray stri})es of denser pubescence and the antennse are 

 annulate; the pubescence of the Pacific coast form is fulvous. Breeds 

 in the small branches of various poplars {Popuhi.^).'] " Ham." 



S. concolor ;Lec., 1852, Jour. Ac. Nat. Sci. feer. 2, ii, 163; Can. Ent. xx, 7 ; 

 Meras inornata X Walsh, Proc. Ent. Soc. Phil, vi, 264; inornata X Packard, 

 Forest Insects, p. 427, text but not fig. 

 lA-ngth 11 12 mm. =: .44-.48 inch. Habitat. — Canada, Maasachusetts, New 

 York, New ,Tei-sey, Pennsylvania, Michigan, New Mexico. 



[Black, resembling mresta, but the pubescence and punctuation ai'c 

 much finer and denser ; as in it the antennae are annulate. Breeds 

 abundantly in the canes of willow (Sali.c lo7ir/ifolia), and also in the 

 base of young jwplars (Po])ulii.'<).'] " Ham." 



Tribe XV. Phytoeciini. 

 Episterna of metathorax wide. 



Ei)ipleune indistinct ; ungues feebly toothed or cleft Meea)*. 



Epipleune distinct ; ungues broadly appendiculate Ob«'resi. 



Ei>isterna of metathorax moderate. 



Eyes broadly divided ; prothora.\ dilated on the sides. 



Ungues broadly ap])endiculate Tetrops. 



Ungues cleft Totraope9«. 



Eyes not divided ; ungues cleft. 



.\ntennie pilose, outer joints suddenly shorter .4inplii4»iiyclia. 



TRANS. AM. KNT. SOC. XXIII. MAY, 1896. 



