82 



THE CANADIAN ENTOMOLOGIST. 



run down to the first group of species, but runs out by its hyaline 

 wings with spots. By de Meijere's key (Tijd. voor Ent., vol. 54, 

 p. 33, 34) it would run down to L. notata Wulp, a much larger 

 insect witli entirely different body-coloration. 



Genus Molophilus Curtis. 

 1833. Molophilus Curtis; Brit. Ent., p. 444. 



Molophilus sirius, sp. n. (Fig. 11.) 



Body coloration dark brown ; hypopygium of the male with two 

 pairs of chitinized appendages which are finely denticulate at the tip. 



Male. — Length 3.5 mm.; wing, 5.4 mm. 



Female. — Length 4.8 mm.; wing, 5.5 mm. 



Rostrum and palpi dark brown. Antenna? broken. Head 

 brownish grey, the occiput paler behind. 



Pronotum and anterior margin of the mesonotal praescutum 

 pale whitish yellow, remainder of the pra^scutum brown, the space 

 before the pseudosutural foveae yellow, the fovese and tuberculate 

 pits dark brown; lobes of the scutum dark brown; scutellum and 

 postnotum brown. Pleurae brown. Halteres with the knobs very 

 large, elongate, stem brown, knobs paler. Legs with the coxae and 

 trochanters dull dark yellow, remainder broken. Wings hyaline 

 or nearly so, the veins rather pale with abundant long dark brown 

 hairs. Venation as in the figure. 



Fig. II. — Molophilus sirius. 



Abdomen dark brown, the valves of the ovipositor brownish 

 yellow. Male hypopygium with the ventral-lying pleural appen- 

 dages fleshy, long, slender and finger-like, clothed with long hairs; 

 underneath these fleshy lobes are a pair of chitinized hooks, straight 

 basally, curved ventrad and inward at their tips and on the under 

 face with several small teeth. Dorsad of these are a pair of shorter 

 chitinized appendages, almost straight, the dorsal face near the tip 

 with minute teeth. Dorsal lobes, short, rounded at tip, flat, 



