460 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Thorax. — Black; the following parts pale cream-color: pos- 
terior dorsal margin of lobes of collar broadly, mesoscutellum, and 
a large spot on the meta-episternum ; tegulae dark ferruginous. 
Prescutum and mesoscutum very finely and densely punctate; 
mesoscutellum moderately convex; meso-episternum with its 
anterior upper portion roughened by rather coarse and irregular 
punctures, and moderately pointed. 
Abdomen. — Black; third, fourth, and fifth terga with their 
corresponding sterna dull ferruginous, and the sides of the basal 
tergum pale cream-color. 
Legs. — The following parts black: anterior coxae above and 
outside and beneath at base, the middle and posterior coxae, 
trochanters, a narrow longitudinal band on the anterior femora 
above, the posterior femora entirely and the intermediate except 
the apical half before, and apical third of posterior tibiae; the 
following parts ferruginous: the remainder of the anterior coxae 
and anterior and intermediate femora, the anterior tibiae except 
the anterior face, the intermediate tibiae and the basal two- 
thirds of the posterior; the following parts cream- white: anterior 
face of anterior tibiae and all the tarsi. 
Wings. — Fore wings faintly pale honey-yellow; stigma brown; 
costal cell fairly strongly translucent; veins blackish. Hind 
wings hyaline, apical half faintly clouded. » 
Length. — 10 mm. Robust. 
Redescribed from one specimen. 
Tenthredella neoslossoni (MacGillivray) is the same as a speci- 
men of cogitans in the collection of the American Entomological 
Society. This specimen was received by Cresson from Provan- 
cher himself and is, therefore, a metatype, or at least an authentic 
specimen. 
Habitat. — Franconia, New Hampshire; Quebec (?) (Provan- 
cher), Canada. 
