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. IQ 
Pectus black. j 
10. Anterior tibiae with a black line above. $ 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 tegulae, the 
pronotum at side, the V-spot, two spots on the postscutellem, the caudal por¬ 
tion of the metathorax, the prosternum, the pectus, the pleura?, a line at the 
base of the wings, a spot above the posterior coxae, 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, 
L. H. (Mrs. Annie Trumbull Slosson). secundus, sp. nov. 
Anterior tibiae 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), a spot on the collar, the 
tegulae, a spot above the anterior coxae, the V-spot, a broad angulate mark on 
the pleurae, a line on the metapleurae, 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. 
^ lOTSe ). simulatus. sp. nov. 
11. 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 antennae, a spot above the base 
of each antenna, an ovate spot at the inner angle of the eye, the cheeks, the 
collar, the tegulae, 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. 
