No. 22.] HYMENOPTERA OF CONNECTICUT. 763 



Tenthredo lobatus var. a. Norton, Trans. Am. Ent. Soc, ii, 

 1868-69, p. 229, n. 6, 8. 



" Norton's specimen of var. a, as far as I know, is lost, but 

 there is an authentic female specimen from Connecticut in 

 the Norton Collection in the Peabody Museum, Yale University. 

 Can this specimen be the original one? 



" Female. Differs from lobata lobata as follows : 



" Head. A yellowish, or yellowish white spot, or longitu- 

 dinal line usually on the posterior portion of the vertex plate on 

 each side, very often a minute elongate spot at the terminus of 

 each arm of the epicranial suture ; the black spot on the posterior 

 half of the cheek sometimes coalesces with that along the upper 

 part of the eye; basal segment of antennae usually black inside, 

 and the yellowish line outside sometimes absent. Supraantennal 

 ridges from moderately prominent to prominent. 



" Thorax. Margin of pronotum not interrupted antero- 

 dorsally; V-spot,on prescutum very often not complete posterior- 

 ly; the following additional parts yellow or yellowish white, 

 a short longitudinal line on the mesoscutum on each side of the 

 posterior portion of the prescutum, a triangular spot at the pos- 

 terior end of the mesoscutum immediately in front of each an- 

 terior angle of the mesoscutellum, the anterior margin of the 

 mesoscutellum in part (rarely), a small spot on the metascutum 

 behind and under each cenchrus, and the greater mesal upper half 

 of the metapostscutellum ; as a rule only a small spot at the upper 

 anterior angle of the mesoepisternum, and very often a small 

 yellowish white, or straw-colored spot at the posterior end of 

 the pectus on each side of the median longitudinal suture. Mes- 

 oscutellum from slightly to moderately convex; mesepisternum 

 from moderately to fairly sharply pointed. 



"Abdomen. Venter with only the pleura straw-color. 



" Legs. Trochanters black above, sometimes almost entirely ; 

 anterior femora usually black behind; very frequently interme- 

 diate femora black except more or less before; the black on 

 apical portion of posterior tibiae often more extensive above 

 about half-way up towards base. 



" Wings. Fore wings sometimes hyaline ; costa not brown. 



" Described from a type and five paratypes, the female in the 

 Peabody Museum referred to above being selected as the type. 

 Two of the paratypes are in the collection of the Boston Society 



