62 THE CANADIAN ENTOMOLOGIST 



This interesting late-summer and early-autumn species is 

 similar to T. caJcar O. S., which, in the male sex, has the stigma of 

 the wings almost indistinct, and the hypopygium very small and 

 pro\-ided with short hairs; in aittumnalis the stigma is brown and 

 the elongate male hypopygium is densely provided with long, dark 

 hairs. In the female sex, the reduced wings of the new species are 

 very curious, {autnmnalis, length of body 20 mm.; wings 9.5 mm.; 

 calcar, length of body 17 mm.; wings 14 mm.), and the ovipositor 

 has the tergal valves strong, powerful, almost straight and rather 

 blunt at their tips; in calcar, the tergal valves are shorter, strongly 

 up-curved and more pointed at their tips. 



Tricyphona cervina, sp. n. 



Allied to T. septentrionalis Bergr.; colour light fawn-yellow; 

 antennae brownish black throughout, the basal flagellar segments 

 crow^ded, the apical ones attenuated; mesonotum with three stripes; 

 ovipositor and hypopygium bright yellow. 



Male. — Length 6 mm.; wing 7.8 mm. 



Female. — Length 8 mm. ; wing 8.5 mm. 



Rostrum and palpi dark brown. Antennae dark brownish 

 black, the first segment a little grayish pruinose; first six segments of 

 the flagellum large and closely approximated, the remaining seg- 

 ments elongate and attenuated (as in T. septentrionalis) . Head 

 brownish gray, clearer gray behind and on the gen^e beneath. 



Mesonotal pra^scutum light brown with a golden pollen, with 

 three dark brown stripes; the middle stripe is longest, narrowed 

 behind, broadened anteriorly, indistinctly bisected behind by a 

 vitta of the ground-colour; lateral stripes short; scutum and post- 

 notum grayish yellow; scutellum more yellowish. Pleura reddish 

 brown with a sparse gray or grayish-white bloom. Halteres pale 

 yellow, the knobs very slightly darkened. Legs with the coxae 

 yellow, sparsely gray pruinose on the outer face; trochanters dull 

 yellow; femora dull yellow, passing into brown at the tips; tibiae 

 yellowish brown, a little darkened apically; tarsi brown. Wings 

 nearly hyaline; stigma pale brown; veins brown. Venation: petiole 

 of cell Ri moderate, about equal to or shorter than cell 1st JI/2; 

 cell 1st Ml pointed at inner end (as in septentrionalis) ; petiole of 

 cell Ml long, much longer than either cell M\ or 1st M-i; basal 



