60 THE CANADIAN ENTOMOLOGIST. 



that it should be placed in the genus Monostegia. It is certainly very 

 unlike the other species of Harpiphorus. Under the name M. ignota, 

 Nort., I propose to retain a few immaculate specimens which also 

 slightly differ in other respects. 



Macrophya albilabris, n. sp. Male — Length, 8 mm. Black ; 

 anterior legs and base of posterior pale. Head rugosely punctured, 

 almost opaque, no depressions or sutures above antennae ; clypeus deeply 

 emarginate, labrum truncate ; both, with spot on mandibles, white ; 

 antennas stout. Thorax coarsely punctured, the scutellum rugose ; edge of 

 tegulae and fine line on border of prothorax white ; anterior and median 

 legs pale, including portion of coxae, the femora and tibiae with dusky 

 abbreviated lines above ; tips of posterior coxae, the trochanters, basal 

 third of femora with line below to apex, white ; remainder of femora, the 

 tibiae and tarsi, black. Edges of basal plates white dorsally. 



One male taken near the city, but not dated. This insect is closely 

 allied to M. flavicoxce, Nort., and may prove but a variety of that species, 

 though none of my examples of flavicoxce show any variation of this 

 kind. The chief differences are in the colour of the posterior legs, the 

 white touches on basal plates, and the more deeply emarginate clypeus. 



Pachyprotasis omega, Nort. — The insect described by Provancher 

 (Can. Ent., Vol. XVI I., p. 50.) as Synairema americana, seems, from 

 his description, to be identical with this species, except that he gives the 

 length as .46 inch, whereas my largest specimen of omega is only about 

 .35 inch. Norton in his description of the species gives the length as 

 .26 inch. 



Pachyprotasis delta, Prov. Since my notes on this species (Can. 

 Ent., Vol. XVIII. , p. 32) I sent to Mr. Kirby a small lot of Tenthre- 

 dinidje regarding which he writes : " The principal remark I have to make 

 on this lot of insects is, that the insect sent as Tenthredo (?) delta, Prov., 

 is a true Pachyprotasis, near P. discolor, Klug., an European species." 



Pachyprotasis varipicta, Har. On June 7th, I captured two males 

 which evidently belong to the species which I described as a Harpiphorus 

 (Can. Ent., Vol. XXL, p. 96), and these show that the species belongs 

 to Pachyprotasis, and has, like P. delta, very unstable wing venation. One 

 specimen has, like the female described, two cross nervures in the lanceo- 

 late cell of one wing. The other has in the right anterior wing five sub- 

 marginals, the third cell being subdivided almost in continuation of the 

 second recurrent. These males differ from the female only in having the 



