144 Journal New York Entomological Society. f^'o'- xxvi. 



Opercula long and with the legs usually somewhat chest- 

 nut colored ; the uncus when seen in profile forked, 

 resembling the open mouth of a snake. 



similaris (Smith & Grossbeck). 

 Opercula much shorter, more rounded, and the black 

 area on the under side of the abdomen in the nature 

 of an even stripe. I'ncus not forked. 



lyricen (De Geer). 



Blacker than typical lyricen, lacking the considerable 



amount of fulvous markings on the pronotum and 



mesonotum. A fulvous somewhat anchor-shaped mark 



centrally on the pronotum. 



lyricen var. engelhardti (Davis). 

 DD. Central area of the abdomen not black beneath, often 

 pruinose, as well as the long opercula. 

 Collar black, often with a greenish spot each side near 



the outer angles sayi (Smith & Grossbeck). 



Collar all green or nearly so, as well as the pronotum 



and mesonotum sayi var. australis (Davis). 



BB. Uncus broad at the base, triangular in shape and generally about as 

 broad as long. Opercula broad and rounded at the extremities ; 

 no definite black area on the central part of the abdomen be- 

 neath, usually unicolorus. 

 E. Wings long and narrow, collar 2 mm. or less in breadth at cen- 

 tral portions ; dorsum of abdomen black or nearly so. 

 Basal cell of fore wings rusty in color, anal cells (mem- 

 branes) of both pair of wings gray; usually expands no 



mm. or more resonans (Walker). 



Basal cell of fore wings often black' or nearly so, anal cells 

 of both pair of wings yellowish. Expands about 100 



mm figurata (Walker). 



EE. Wings broad, hind margin of the pronotum or collar green or 



greenish and more than 2 mm. broad. 



F. Anal cells or membranes at base of fore and hind wings gray. 



Dorsal segments of the abdomen not margined with 



brown ; in fresh specimens the basal segments pruinose, 



also the terminal segments, leaving the four middle 



segments black. A large species expanding over no 



mm auletes (Germar). 



FF. Anal cells or membranes at base of fore and hind wings 



light orange, two prominent marks on the mesonotum 



resembling the Hebrew letter resh inverted. 



Fore wings with the first and second cross veins clouded, 



and the dorsum of the abdomen brownish or brownish 



black resh (Haldeman). 



Fore wings with the first and second cross veins but 



