1941] 
Flies of Family Syrphidse 
49 
pleural spot that is confluent with a broad, post-marginal 
stripe of the mesopleurse and an obscure spot on the upper 
spot of the sternopleurse. Post calli and the scutellum light 
yellow, the latter with a diffuse, though conspicuous, black 
discal spot. Pile of thorax and pleurae thick, erect and red- 
dish brown, becoming longer and blacker on the scutellum. 
Abdomen: with nearly parallel sides, widest at the base of the 
fourth segment, where it is fully as wide as the widest part 
of the thorax. Abdomen nearly opaque black with five pairs 
of yellow spots, none of which, except the first pair on the 
first segment, reach the lateral margin. Spots on the first 
the segment. Third segment with more elongate spots, sepa- 
rated by less than the width of a spot. The spots of the 
fourth segment practically identical with the third ; the spots 
rated by at least the length of a spot. The spots are roughly 
triangular, with rounded angles, and placed midway along 
the segment. Tih.rd segment with more elongate spots, sepa- 
rated by less than the width of a soot. The spots of the 
fourth segment practically identical with the third ; the spots 
of the fifth segment somewhat smaller, with sharply-pointed 
inner ends and more narrowly separated. Pile on the basal 
part of the abdomen reddish-brown, becoming almost yellow 
on the extreme corners, elsewhere black. Legs : chiefly black ; 
base of the hind femora, their apices and the apices of the 
middle femora, front femora and the bases of their respective 
tibise dark brownish. Wings: with a strong brownish uni- 
form tinge. Subapical cross vein elongate, the final section 
recurrent, the entire cross vein sigmoid. 
Holotype: male. Sao Paulo, May 6-8, 1939 (J. Lane, collec- 
tor) . 
