AMERICAN HYMENOPTERA. 43 



color on venter; wings hyaline, very slightly obscure, nervures brown, costa 

 yellowish, stigma black, yellowish inferiorly; lanceolate cell without cross- 

 nervure; under wing with two middle cells." 



Hah. — Canada. (Coll. Provancher). 



Pwcilostoma albosecta Provancher, {Slrongylogaster), Nat. Can. x, 

 168.— ''9.— Length .32 inch. Testaceous; head, antennae and metathorax in 

 part, black; antennse short, third joint almost double the length of the fourth; 

 clypeus emarginate, margined with white; labrum rounded, and with the 

 palpi, pale; a spot on mesothorax anteriorly and the metathorax in part, 

 black; legs dull yellowish, the trochanters and tips of coxae, white; abdomen 

 depressed, dull testaceous, each segment with a white margin at tip: wings 

 hyaline, slightly obscure, nervures brown, pale at base, costa and stigma yel- 

 lowish, the latter with a pale streak from base nearly to tip; lanceolate cell 

 with an oblique cross-nervure; under wing with one middle cell." 



Hah. — Canada. (Coll. Am. Ent. Soc.) 



Tenthredo pallicoxa Provancher, Nat. Can. x, 201.— ? .—Black; 

 clypeus, labrum, mandibles except tips, lower half of cheeks, palpi, posterior 

 angles of prothorax, the lower margin narrowly, tegulse, narrow line on sides 

 of pleura, spot above posterior coxae, sides of basal plates, most of coxae, 

 trochanters, four anterior legs except line above, base of posterior femora 

 within and line beneath, yellowish-white; antennse slender, longer than head 

 and thorax; wings hyaline, nervures and stigma black; abdomen stout, fer- 

 ruginous, shining, basal segment and sometimes the disk of the two following, 

 black. Length .44 — .50 inch. 



Hah. — Canada. (Coll. Am. Ent. Soc.) 



Tenthredo COgitans Provancher, (Allantus), Nat. Can. x, 163.— 9. — 

 Black, opaque; dot at summit of eyes within, sometimes obscure, spot between 

 antennae, line beneath eyes, clyi>eus, labrum, mandibles except tips, upper 

 posterior angles of prothorax, scuteilum, spot above posterior coxae, and spot 

 at sides of basal plates, white or yellowish-white; most of palpi, scape beneath, 

 tegulae, anterior femora except base, intermediate pair at tip within, four 

 anterior tibiae, posterior pair except tips, and more or less of segments 2 — 4 

 of abdomen, ferruginous; tarsi mostly yellowish; clypeus deeply notched, 

 labrum broad, rounded; antennse as long as head and thorax, slightly thick- 

 ened medially, slender and shading into ferruginous at tips, third joint a little 

 longer than the fourth; wings slightly smoky, nervures and stigma black, the 

 former pale at base. Length .40 inch. 



Hah. — Canada. (Coll. Am. Ent. Soc.) 



Tenthredo linea<a Provancher, Nat. Can. x, 198.— 9.— Black; dot at 

 summit of eyes, clypeus, labrum, line beneath eyes connected with spot on 

 lower part of cheeks, mandibles except tips, posterior angles of prothorax, 

 tegulae, line on lower sides of pleura, spot above posterior coxae, spot or two 

 spots on pectus, spot on sides of basal plates and on sides of abdominal seg- 

 ments, a line, sometimes interrupted into spots, on disk of the two or three 

 apical segments above, and all the coxae and trochanters, white or yellowieh- 

 wbite; antennse slender, apical joints brown; wings hyaline, nervures and 



