THE CANADIAN ENTOMOLOGIST 325 



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

 1868-9, p. 229, n. 6, 9 . 



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? 



Type locality — Farmington, Connecticut. 



Female — Differs from lobata lobata as follows: 



Head — A yellowish, or yellowish -white spot, or longitudinal 

 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 posteriorly; 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 posterior 

 end of the mesoscutum immediately in front of each anterior 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 metapost- 

 scutellum; as a rule only a small spot at the upper anterior angle 

 of the mesoepisternum, and very often a small yellowish-white, or 

 straw-coloured spot at the posterior end of the pectus on each side 

 of the median longitudinal suture. Mesoscutellum from slightly to 

 moderately convex; mesoepisternum from moderately to fairly 

 sharply pointed. 



: Abdomen — Venter with only the pleura straw colour. 



Legs — Trochanters black above, sometimes almost entirely; 

 anterior femora usually black behind ; very frequently intermediate 

 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. 



