282 THE CANADIAN ENTOMOLOGIST. 



A single specimen received from Mrs. Annie Trumbull Slosson. 

 Readily separated from the described American species by the colour of 

 the pleurae. 



Tenthredo bilineatus, n. sp. % . — Black, with the following parts 

 yellow : the clypeus, the labrum, the mandibles except at apex, a spot on 

 the front beneath the antennae, an ovate spot on the antennal ridges 

 above the base of each antenna, the lower half of the cheeks, an elongate 

 mark on the inner margin of the eye (this mark is half as long as the 

 inner margin of the eye, reaching the meso-caudal angles of the eye, 

 obliquely truncated in front, roundly emarginate on its mesal side, 

 extending slightly beyond the caudal margin of the eye, a rine spur 

 extending from the middle of its caudal margin to an elongate, quadrangu- 

 lar spot along the latero-caudal margin of the head, sub-interrupted from 

 the mark on the cheeks, not extending mesad beyond the mesal margin 

 of the spot or the inner margin of the eye), a small spot on the vertex, in 

 a line with the spots on the latero-caudal margin of the head and caudad 

 of the ocelli, the tegulce, the collar, two lines on the mesonotum, converg- 

 ing behind, a broad line from the scutellum to the base of the anterior 

 wings, the cenchri, a small triangular spot on the cephalo-dcrsal corner 

 of the mesopleurae, a spot above the posterior coxae, the basal membrane, 

 two large spots on the sides of the basal plates, the trochanters, the bases 

 of the femora, the front tibiae and tarsi, and the middle tibiae slightly 

 beneath ; the following parts rufous : the first segments of the antennae 

 entirely and the second and third on the inner side, the front and middle 

 femora, the tibias above, the posterior femora beneath at apex, the 

 posterior tibiee, the middle and posterior tarsi, the venter, a narrow 

 margin to the tergal segments one to three, and the tergal segments 

 beyond the third ; the third segments of the antennae one-third longer 

 than the fourth ; the clypeus emarginate ; the wings hyaline, slightly 

 yellowish ; the veins black j the costa and the base of the stigma luteous. 

 Length. 6 mm. 



Habitat — Ithaca, New York. 



This species will be readily recognized by the markings on the head 

 and mesonotum and the colour of the basal segments of the antennae and 

 the apex of the abdomen. 



Tenthredo paUipundus^ n. sp. ^ . — Black, with the following parts 

 yellow : the clypeus, the labrum, the mandibles except at apex, the 

 lower part of the cheeks, a line on the collar, a spot above the posterior 



