428 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Variety. — In a single female from Maine the black behind the 
upper part of the eye extended all the way back to the pos- 
terior margin of the head. 
Habitat. — Woods Hole, Martha's Vineyard, Amherst, Auburn- 
dale, Lunenburg, Chester, and Sherborn, Massachusetts (May to 
August inclusive); St. Johnsbury, Burlington, and Amsden, 
Vermont (June to August inclusive); Durham, New Hampshire; 
Eastport, Capens, Machias, South West Harbor, and Orr's Isle, 
Maine (June to August inclusive); Nova Scotia (W. F. Kirby), 
Quebec (?) (Provancher) , and Ontario (June and July, Harrington) , 
Canada; New York; Illinois; Pennsylvania; New Jersey (Norton) ; 
"Western States" (Cresson). 
This seems to be a widely distributed species, and is quite com- 
mon in New England. Both sexes were very common in Amherst, 
Massachusetts, during the spring and summer of 1911, but the 
following year both were rather rare. 
Tenthredella nortoni Smulyan. 
Tenthredella nortoni Smulyan, Can. Ent., vol. 47, 1915, p. 321-323, d'. 
The type is in the collection of the United States National 
Museum: No. 19093. Type locality, Massachusetts. 
Male. — Head. — Straw color; the following parts black: the 
back of head, a large spot on front above antennae and vertex, 
distinctly trilobed anteriorly and somewhat less distinctly lat- 
erally, extending from the posterior margin of the head to between 
the bases of the antennae medially and connecting rather nar- 
rowly about half-way between the posterior margin of the eye 
and the posterior margin of the head with a smaller elongate spot 
behind the upper part of the eye which extends back about 
half-way toward the posterior margin of the head; an elongate 
brownish spot on the posterior half of cheek, the upper portion of 
which is black; antennae black, the inside of the basal segment in 
part rufescent, or straw color. Head behind eyes distinctly nar- 
rower than through them; vertex-plate quite convex; supra- 
antennal ridges fairly prominent. 
Thorax. — Black; the following parts straw color: presternum 
except medially and longitudinally, a minute spot on the ventral 
face of the propleura on each side, margin of pronotum (inter- 
