38 NOTES ON MELANOSTOMA (dIPTERA; SYRPHIDAE) 



Thorax and scutcllum shining bhiish-gray, pile fulvous; scutellum with a 

 border of longer fuscous hairs; pleura white jmIosc. Halteres gray. Tegulae 

 white, fringe fulvous. Wings exceeding the body in length, hyaline, stigma 

 dilute yellow. Legs testaceous, femora black except at apices; front and 

 middle tibiae with a narrow fuscous ring, hind tibiae with a broader black ring; 

 tarsi except the basal joint of four anterior legs fuscous; all the tibiae with a 

 row of long slender black hairs, pile on legs elsewhere mostly white. 



First abdominal segment shining bronze black. Second segment opaque 

 black, on each side with an elongate shining greenish-gray spot; this spot is 

 produced along the anterior borders and again at the middle of the segment, 

 and is narrowly separated from the posterior border. Third segment opaque 

 black, with two triangular shining greenish-gray spots extending along the 

 anterior border and reaching along the sides two-thirtls the length of the seg- 

 ment; an indefinite narrow shining stripe runs down the middle of the seg- 

 ment. Fourth segment shining greenish-gray; on the posterior half two 

 slightly oblique opaque black spots, narrowly separated in the midtUe and 

 narrowly cut off from the posterior border of the segment; these spots 

 touch the lateral margin just anterior to the posterior angles. Fifth segment 

 shining greenish-gray. Hypopygium shining black, jmIc of abdomen white, 

 on opaque portions black and whit(> intermixed. 



Length, 7.1 mm. 



Descril^ed from two individuals collected in Ontario, Canada, 

 (C. H. Curran), in 19L3. 



Female. Antennae brownish-black; third joint yellow below, oval, twic(> 

 as long as wide; ar-sta fuscous. Vertex shining black, pile black. Face witli 

 obscure ripple-like whitish pollen, which extends "upward on the side to the 

 vertex; in the middle a black shining stripe not reaching the antennae; iiile 

 of the face white. Cheeks shining black, with scant grayish-white pollen, white 

 pilose. In profile the face is shallowly excavated below the antennae, the 

 facial tubercle slightly protruding beyond the antennal tubercle; below the 

 facial tubercle the face recedes. Eyes bare. Occiput while jiollinose, white 

 pilose. 



Thorax and scutellum shining bluish-gray, pile light yellow; on the bonlei- 

 of the scutellum two longer pale hairs. Wings exceeding the abdomen in 

 length, stigma dilute yellow. Halteres dull yellow. T(;gulae white, fringe 

 fulvous. Legs testaceous, basal half of front and middle femora, basal two- 

 thirds of hind femora, black; hind tibiae fuscous; hind tarsus and last two 

 joints of four anterior tarsi black. 



First abdominal segment shiiu'ng black. Second segment opaciue black 

 with two triangular shining bronze spots, broadly sei)arate(l, reaching behind 

 almost to the posterior angle of the segment. Tliiid segment ojiaque l)lack, 

 with an anterior shining bronze fascia, wliicli is |)rodiic(Ml lit crnlly almost to 

 the j)osterior angle of the segment. Fourtli scguiciit shining bluish gray, in 

 front with two triangular bi'onze spots; on the postciinr half of the segment 

 two slightly ()l)li(|U(' o|ia(|ue black spots narrowly scpaialcd and joining the 



