6l6 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. 



pale on middle, then the dorsum chiefly fuscous to blackish ; gen- 

 eral coloration fuscous or blackish on a paler background 



(p. 631) Group II 

 Antennae more nearly pale, yellowish, or reddish than blackish, 

 segment ii sometimes fuscous at apex and near base but more pale 

 than fuscous (in tibialis with a slender fuscous line on anterior 

 face) ; general coloration usually yellowish to reddish over a 

 paler backgroimd (p. 644) Group IV 



Key to Species of Group I. 



1. Antennal segment i greatly thickened, cylindrical, thickness nearly 



equal to dorsal width of an eye 2 



Antennal segment i more slender, thickness distinctly less than 

 dorsal width of an eye 4 



2. Antennal segment ii uniformly yellowish, scarcely dusky at apex 3 

 Antennal segment ii yellowish, blackish on apical one-fourth 



(p. 617) lasiomerus 



3. Antennal segment i with two distinct types of hairs, set with erect 



black bristle-like hairs and between with shorter, more recum- 

 bent, sparsely set black hairs; scutellum with reddish each side 



of median line, clothed with sericeous white pubescence 



(p. 618) pallidicornis 

 Antennal segment i with shortest of black hairs so long as to be 

 easily confused with the erect bristle-like hairs ; scutellum uni- 

 formly yellowish, sparsely clothed only with simple erect pubes- 

 cent hairs (p. 619) rubropictus n. sp. 



4. (i) Antennal segment ii chiefly blackish, usually annulated with 



pale 5 



Antennal segment ii uniformly yellowish, frequently somewhat 

 dusky at apex and near base ; dorsum chiefly reddish on a pale 

 yellowish background (p. 620) ulmi 



5. Antennal segment ii black at base, with a pale annulus somewhat 



removed from base 6 



Antennal segment ii with pale annulus at base ; blackish beyond ... 7 



6. Antennal segment i, in length, equal to length of head and prono- 



tum taken together, also greater than width of pronotum at base ; 

 basal submargin of pronotal disk with four black callous spots, 



two each side of median line (p. 624) antennalis 



Antennal segment i, in length, only equal to length of pronotum 

 plus one-third length of head, likewise not equal to width of pro- 

 notum at base (p. 621 ) palmeri 



7. (5) Antennal segment iii with pale annulus at base and at middle 8 

 Antennal segment iii with pale annulus only at base, sometimes 



obsolete • • • • 9 



8. Dorsum bearing both black and white scale-like hairs, turned on 



edge; propleura pale on lower half but without distinct white 

 line above middle of coxal cleft; lower half of face with some 



fuscous (p- 626) conspurcatus 



Dorsum without distinct scale-like hairs; propleura white, black 

 along dorsal margin, with a clear-cut black line across lower half 

 of coxal cleft and extending to basal margin ; lower half of face 

 white (P- 624) davisi n. sp. 



9. Antennal segment ii black, a pale band at base but at most only 



narrowly pale on middle • • • ; • • • • ^^ 



Antennal segment ii broadly pale yellowish to dusky on middle, 

 dark fuscous only at apex and next to pale band at base ; small 



slender species, length 5.1 mm (p. 622) minutulus 



10. Antennal segment iii pale at base ^ i 



