JOURNAL 
» 
OF THE 
39orh 6lntomoIogiraI 
^ol. V. SEPTEMBER, 1897. No. 3. 
NEW SPECIES OF TENTHREDO. 
By Alex. D. MacGillivray, Ithaca, N. Y. 
The species described below are arranged analytically so that the 
labor of reading descriptions in determining specimens may be reduced 
to a minimum. The grouping is the same as that used by Norton in the 
Transactions of the American Entomological Society and consequently 
can be compared directly with it. 
1. Antennae wholly or in part pale. 2 
Antennae wholly black. ^ 
2. Antennae wholly pale. ^ 
Antennae in part black. 
3 - Abdomen black at base and rufous at apex, with the basal plates rufous. 
redimaculus MacG. 
Abdomen entirely black. £ .—Black, with the following parts whitish-fuscous : 
the labrum, the base of the mandibles, the apical half of the front femora be¬ 
neath, and a square spot on the sides of the basal plates; the antennae pale 
luteous beyond the second segment; the clypeus squarely emarginate; the 
third segment of the antennae one-fourth longer than the fourth ; wings hya¬ 
line, very slightly infuscated; the veins, including the costa and the stigma, 
black. Length, 12.5 mm. Habitat.—Jay, Vermont (A. P. Morse.) 
dubitatus, sp. nov. 
4 - Abdomen rufous beyond the basal plates. basilaris Prov. 
Abdomen rufous beyond the third segment. bilineatus MacG. 
5. Head more or less yellow above the base of the antennae.6 
Head black above the base of the antennae. . .12 
6. Abdomen wholly or in part yellow.7 
Abdomen wholly or in part rufous. g 
7 » Pectus pale. g 
Pectus black. £>.—Black, with the following parts yellow : the clypeus, the 
labrum, the mandibles except at apex, a triangular spot between and beneath 
the antennae, the lower half of the cheeks, an ovate spot above the base of 
each antennae, the inner margin of the eyes (interrupted opposite the bases 
