Sept. 1897.] MacGillivray : New Species of Tenthredo. 105 



$ . — The markings have more of a greenish tinge, with the following dif- 

 ferences in the arrangement of the pale markings : a spot on the middle of 

 the pectus, the five basal ventral abdominal segments (the remainder black), 

 and the apical two-thirds of the third and the fourth segments of the tergum 

 yellowish (the following segments black). Length, 11 mm. Habitat. — 

 Olympia, Washington (Trevor Kincaid); Seattle, Washington (S. Bethel). 



obliquatus, sp. nov. 



9. Pectus pale 10 



Pectus black 1 1 



10. Anterior tibia; with a black line above, g 9 . — Black, with the following parts 

 yellowish-white : the clyepus, the labrum, the mandibles except at apex, the 

 face below the antennae, a line on the inner orbits extending half way to the 

 caudal margin of the head, the cheeks broadly, the collar, the tegulce, the 

 pronotum at side, the V-spot, two spots on the postscutellem, the caudal por- 

 tion of the metathorax, the prosternum, the pectus, the pleurse, a line at the 

 base of the wings, a spot above the posterior coxje, the sides of the basal 

 plates, the venter, the coxae and trochanters, the anterior femora except a 

 short line at apex above, and the remainder of all the legs except a black line 

 above and the most of the posterior tibiae ; the tergum beyond the third seg- 

 ment, including the saw-guides, rufous ; the third segment of the antennae 

 twice as long as the fourth ; the wings hyaline; the veins black; the stigma 

 pale at base. Length, 10 mm. Habitat. — Franconia and Mt. Washington, 

 N. H. (Mrs. Annie Trumbull Slosson) secundus, sp. nov. 



Anterior tibia; wholly pale. 9- — Black, with the following parts yellowish- 

 white : the clypeus, the labrum, the mandibles except at apex, the cheeks en- 

 tirely, the inner margin of the eyes, extending beyond the eyes (the cephalic 

 margin of the black spot on the vertex trilobed j, a spot on the collar, the 

 tegula;, a spot above the anterior cox^, the V-spot, a broad angulate mark on 

 the pleurae, a line on the metapleuras, a spot above the posterior coxae, a spot 

 on the pectus, the postscutellum, the basal membrane, the sides of the basal 

 plates, the first abdominal segment, the venter at base, and the front legs be- 

 neath ; the legs rufo-luteous except the parts named above and a black spot 

 on the apex of the anterior femora above and a black ring on the basal one- 

 third of the posterior tibiae ; the five apical abdominal segments, including the 

 venter, rufous ; clypeus squarely emarginate, the third segment of the anten- 

 nae one-third longer than the fourth ; the wings hyaline, slightly yellowish ; 

 the veins brown ; the costa and the stigma luteous, the apex of the stigma 

 brownish. Length, 12 mm. Habitat, — Winchendon, Massachusetts (A. P. 

 Morse) simulatus. sp. nov. 



1 1. Anterior tibiae black above *magnificus MacG. 



Anterior tibiae wholly pale. 9 . — Black, with the following parts yellow : the 



clypeus, the labrum, the front beneath the antenna;, a spot above the base 

 of each antenna, an ovate spot at the inner angle of the eye, the cheeks, the 

 collar, the tegula;, a triangular-shaped mark on the pleurae, the posterior 

 mesal portion of the pectus, the front and middle coxae, the posterior coxae 



* This species was originally described as a Macrophya. 



