SMULYAN: NEW ENGLAND TENTHREDELLA. 409 
The types are lost, but an authentic specimen of each sex is in 
the Norton Collection in the Peabody Museum, Yale University. 
Type locality, Farmington, Connecticut. 
The type of dubitata is in the collection of Doctor A. D. Mac- 
GilUvray, Urbana, Illinois. 
Female. — Head. — Black; the following parts j^ellowish white, 
or white : as a rule a small spot on each side of ch'peus or the greater 
anterior half of same (spots coalescing), labrum except margin 
(often brown) of variable width, mandibles, usually a very small 
spot on cheek close to eye, four apical segments of antennae 
(usually also the preceding segment in part beneath) and some- 
times a small elongate spot on outside of basal segment; basal 
segments of palpi brown, apical segments as a rule paler, or dirty 
white. Head behind eyes as wide as through them, sometimes 
slightly naiTOwer; supra-antennal ridges prominent to about 
half-way toward the anterior ocellus; hyperclypeus usually com- 
pletely marked off. 
Thorax. — Black; the following parts yellowish white, or 
white: the posterior dorsal margin of lobes of collar as a rule, 
often a spot of variable size on the lateral face of the pronotum, 
mesoscutellum in part as a rule (usually in greater part) , a spot 
of variable size usually on meta-episternum. Mesoscutellum as 
a rule strongly convex; meso-episternum markedly rough, and 
quite sharply pointed. 
Abdomen. — Blue-black; sides and as a rule posterior margin 
of basal tergum (latter sometimes only in part) yellowish white, 
or white. Sixth sternum roundly, broadh', and shallowly 
emarginate. 
Legs. — Black; the following parts dull white or straw color 
(sometimes discolored, and sometimes with a brownish tinge on 
tarsi) : coxae sometimes with a very small spot outside at apex, 
apical half to two-thirds of anterior fcnrora before (broader api- 
cally), intermediate femora usually with a small spot at apex 
before (sometimes minute), anterior tibiae before, intermediate 
tibiae as a rule from only slightly at apex to entirely before, 
posterior tibiae rarely with a small spot at apex before, anterior 
and intermediate tarsi except apices of segments and generally 
