156 ^ THE CANADIAN ENTOMOLOGIST. 



Pupa. — The pupa-shell is white, the thoracic parts not appreciably 

 darkened, but there are two long reddish-brown cephalic spines, precisely 

 as in R. saliciperda, Duf. 



Imago. — Unfortunately, the only available flies are shrivelled and 

 broken. They are similar to R. saliciperda, with the same produced 

 ovipositor. Thorax rather dark gray-brown, scutellum prominent and 

 pallid ; abdomen yellowish brown ; ovipositor clear light ferruginous. 

 Legs pale brown. Venation about as in R. saliciperda. Length about 2 mm. 



Hab. — Near Las Vegas, New Mexico, January 31. (Wilmatte 

 Porter and Mary Cooper.) The gall is apparently nearest to Cecidomyia 

 salicis-hordeoides, Walsh, among the American species. 



Cecidomyia perocculta, n. sp. — Gail. — The insects form no true galls, 

 but live in numbers under the bark of willow stems, the adults hatching 

 about the middle of April. 



/*///«!.— Pupa-shell colourless ; base of antenna? light brown ; no 

 cephalic spines. 



Tmago. — $. Length about 3 mm. Black; scutellum dark red, 

 abdomen faintly reddish ; legs dark brown, tarsi more reddish ; insect 

 with abundant long dark hairs ; sides of abdominal segments with large 

 piliferous tubercles ; thorax slightly shining, with two longitudinal velvety- 

 black bands ; knobs of halteres black or almost so ; eyes united on 

 vertex; forceps stout; antenna moniliform, 2 -|- i8-jointed, with nearly 

 globular stalked joints bearing single whorls of very long hairs ; apical 

 joint with a small terminal knob; wings ample, lower margin with a strong 

 fringe ; first vein terminating about middle of costa ; no cross-vein 

 between first and third ; third distinct from the base, strong, bent down- 

 wards at end, but terminating before the most distal point of wing ; 

 median fold distinct ; fifth vein colourless, forked near or rather beyond 

 the middle. 



Hab. — Colorado Springs, Colorado, April, 1904. 



Early Arrival of an Archippus Butterfly. — I was surprised 

 to see on the loth of May a worn specimen of Anosia plexipptis ( Dafiais 

 archippus) flying about at the corner of Yonge and Bloor streets, Toronto. 

 It alighted on the street close to my feet, and I could easily have secured 

 it if I had had a net with me. The preceding three or four days were 

 very warm, which may account for its coming north so early. — J. B. 

 Williams. 



