THE CANADIAN ENTOMOLOGIST 321 



NOTES AND DESCRIPTIONS OF TENTHREDELLA 



.■>^.- (HyM.) -■^ . 



BY M.T. SMULYAN, PH.D., AMHERST, MASS.* 



The following descriptions and notes on the Tenthredinid 

 genus Tenthredella are offered here preliminary to the publication 

 of a paper on the New England species of this genus. 



Tenthredella nortoni, n. sp. 



The type is in the collection of the United States National 

 Museum: No. 19093. 



Type locality — Massachusetts. 



Male— Head : Straw colour; the following parts black: the 

 back of head, a large spot on front above antennae and vertex 

 distinctly trilobed anteriorly and somewhat less distinctly laterally, 

 extending from the posterior margin of the head to between the 

 bases of the antennae mesally and connecting rather narrowly 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 and which extends back about half way towards 

 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 colour. Head behind eyes distinctly narrower than 

 through them; vertex plate quite convex; supraantennal ridges 

 fairly prominent. 



Thorax black; the following parts straw colour: prosternum 

 except medially and longitudinally, a minute spot on the ventral 

 face of the propleura on each side, margin of pronotum (interrupted 

 dorsally), which may broaden out on the posterior dorsal margin 

 of the lobes of collar and on the lower portion of the lateral face 

 of the pronotum, pronotal lobe, a V-spot on prescutum, tegula? 

 (brownish in part), transverse mesoscutel extensions, upper margin 

 of mesoepimeron, an approximately right-angled band on the lower 

 limit of mesoepisternum (wider on the anterior half) and which 

 may be narrowly interrupted about in the middle, pectus except 

 a rather broad band on each side and more narrowly meso-anterior- 



* Contribution from the Entomological Laboratory, Massachusetts Agricultural 



College. . : . - . 



October, 1915. 



