•44 EDWARD NORTON. 



of third, fourth, fifth and sixth articles testaceous; eyes prominent, 

 vertex square, marked out by a ridge on each side; trunk sub-globose, 

 anterior lobe of thorax with a longitudinal furrow ; thighs and coxai 

 black-blue, under a strong magnifier, beautifully, minutely reticulated, 

 which gives them a silky lustre, the rest of the leg testaceous ; a single 

 strong dentation near the tip, on each side of the groove beneath the 

 two hinder pair of thighs. Wings testaceous hyaline, with piceous 

 nerves and a cloud at the apex; a dense testaceous spot at juncture of 

 marginal nerve with stigma; stigma as in Clmhrx ; abdomen ferrugi- 

 nous or ochraceous, with a dorsal, triangular, black spot, extending 

 from base toward the apex, but not entering the last segment; the ba- 

 silar ventral segments are spotted with brown. 



Var. % . Abdomen, except apex, entirely black. (7'. bicolor.) Mt. 

 Washington, N. H. ; Summit, ( T. facorum, Kirby.) 



Var. % . Abdomen wholly purple-brown. (Canada.) 



Lat. 6.5°, (Kirby.) Canada, Hudson's Bay Territory; Youkon Ri- 

 ver; Ai'ct. Am., (Kennicott.) Puget's Sound, (Kennerley, Smiths. 

 Inst.) 



This seems to be exclusively a northern insect. 



Mr. Kirby does not give the sex of either T. frinnijulum or T. lii- 

 cotnim, but from tlie description, it is evident tliat one is a male and 

 the other a female. I have concluded, whether rightly or not, that 

 they belong to the same species. 



2. T. lanuginosa, n. sp. 



Purple-black, labrum angnlate before; shoulders and pleura with dense ci- 

 nereous hair; wings blackish hyaline. Length 0.(54. Br. wings 1.60 inch. 



9. Shining purple-black, thickly covered with minute punctures; 

 antennae piceous black ; head narrow ; nasus with a triangular notch 

 in middle ; labrum as in 7\ fn'/nn/ii/nm, produced to an angle instead 

 of being rounded; prothorax and pleura covered with long, dense, pale 

 cinereous hair, less dense on the scutel and very little upon the terguni ; 

 abdomen stout and very wide; legs black; tarsi piceous, except base 

 of first and apical two-thirds of last joint; wings blackish hyaline, with 

 a yellowish tinge, clouded at apex ; a dense piceous spot, extending 

 from stigma across most of first discoidal cell. 



Sierra Cxy, California. ((^11. Smiths. Inst. J. Behren.) 



;;. CLAVELLAKIA, Leach. 

 C/avell'irin. Loacli, Zool. Misc. 

 Cimbex, Fabr. 



Wimjs as in Cimbex. 

 Antcnnx 5-jointed, fifth joint forming a club as large as the third. 



