580 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



Breeds on Cephalanthus occidentalis, also collected on Baccharis 

 halimifolia, Myrica cerifera, and attracted to flowers of H enter 0- 

 callis fulva. 



Branford, 27 June, 1904 (H. L. V.) ; East River, 2 Aug., 7 Sept., 1910 

 (C. R. Ely). 



L. fasciatus var. viridiusculus Knight. 



Cornell Univ. Agr. Expt. Sta., Bull. 391, 600, 1917. 



Female: Length 4.6 mm., width 2.05 mm. ; structurally differing 

 very slightly, if at all, from the typical form ; bright green, slightly 

 larger than and lacking the brownish and fuscous coloring of 

 fasciatus; clavus only slightly tinged with fuscous at tip of scutel- 

 lum, a touch of fuscous at inner apical angles of corium ; anal area 

 of membrane not distinctly infuscated ; hind femora with two red 

 marks on upper sides near apices, tibiae reddish on inside at base. 



Massachusetts. 



Subgenus Neolygus Knight. 

 Key to Species. 



1. Pronotal disk blackish or marked with dark rays 21 



Pronotal disk greenish, or yellowish to brownish, but without dis- 

 tinct dark rays 2 



2. Color chiefly greenish, old specimens frequently fading to yellow- 



ish ; sometimes darkened on clavus and at tip of corium but 



ground color green 3 



Color distinctly yellowish or brownish, more brownish than green 10 



3. Tibial spines with fuscous spots at base 4 



Tibial spines without fuscous spots at base 5 



4. Corium with fuscous spot on inner apical angle; clavus greenish 



yellow, more brownish near scutellum and suture . . (p. 584) confusus 

 Corium never infuscated but with dilute bronze on inner half ; 

 clavus and basal half of pronotum distinctly bronzed ... (p. 584) alni 



5. Dorsum uniformly greenish, a small fuscous mark formed at 



extreme inner apical angles of corium and transversely across anal 



area of membrane ; length 5.2-5.7 mm (p. 590) neglectus 



Dorsum with brownish, apical area of corium and usually the clavus 

 distinctly brownish, sometimes dark brownish or even fuscous, but 

 more broadly so than the above 6 



6. Membrane with apical half infuscated along median line, forming 



a distinct longitudinal ray which may be widened apically ; corium 

 with a triangular dark brownish spot just before apex, clavus 



usually brownish ; length 5.6-6 mm (p. 593) belfragii 



Membrane never forming median longitudinal fuscous ray ; smaller 

 forms 7 



7. Antennal segment ii not distinctly infuscated 8 



Antennal segment ii infuscated on apical one-fifth (p. 595) canadensis 



8. Scutellum pale, clavus and apex of corium usually darkened 9 



Scutellum darkened with fuscous, also the clavus more or less, 



corium with a triangular dark patch before apex 



(p. 587) (female) tiliae 



9. Clavus dark brown bordering scutellum only ; apical half of mem- 



brane clear, a fuscous spot at margin each side of middle, a spot 



also bordering tip of cuneus (p. 587) inconspicuus 



Clavus dark brown or fuscous bordering commissure as well as 

 along the scutellum; apical half of membrane rather uniformly 

 infuscated (p. 593) clavi genitalis 



