COLLECTED IN DUTCH NEW GUINEA. 411 



similar to those of the head and thorax. Legs: front- and middle-femora orange, 

 blackish at the base and with rather long, yellow hair on their undersides ; hind- 

 femora in the type dark orange-brown with a black ring near the middle, in the other 

 specimens entirely black ; front- and middle-tibise orange on the basal and black on 

 the apical half ; hind-tibise black, lighter towards the base ; all the tarsi black. 

 Wings almost hyaline, with a slight yellowish tinge except towards the apex ; venation 

 as in the fi2;ure ; halteres yellow. 



Length, 6 9 mm., 2 10 mm. 



The only published description which would at all apply to the specimens before 

 me is that oi Eristalis heterothrix de Meijere (Tijd. v. Ent. li. p. 273, 1908), which is 

 known from Borneo and New Guinea. There are, however, many discrepancies which 

 lead me to believe that I cannot be redescribing de Meijere's species. Although no 

 mention is made of the venation of E. heterothrix, it is possible that it really belongs 

 to the genus Dissoptera, since de Meijere notes the bare eyes, widely separated in the 

 male, and the absence of a central knob on the fa^e. 



Family Muscarid^. 



Subfamily TacMninse. 



Genus Masicera. 

 Masicera Macquart, Soc. Sci. Lille, 1833, p. 285 (1834). 



46. Masicera morio. 



Masicera morio Doleschall, Nat. Tijd. Ned. Ind. xvii. p. 104 (1858). 



1 6 . Wataikwa River, Aug. 1910. 



The specimen agrees structurally with one in the British Museum Collection from 

 Gilolo {A. B. Wallace), but differs in having the scutellum and the base of the 

 abdomen somewhat reddish. 



47. Masicera notabilis. 



Masicera notabilis Walker, Proc. Linn. Soc. London, iii. p. 97 (1859) ; Austen, Ann. Mag. 



Nat. Hist. (7) xix. p. 341 (1907). 

 Phorocera convertens Walker, Proc. Linn. Soc. London, v. p. 240 (1861). 



1 ? . Wataikwa River, Aug. 1910. 



Agrees structurally with Walker's types from Dorey, New Guinea, and Gilolo, 

 the only specimens previously in the British Museum Collection ; but has practically 

 no trace of reddish colour on the abdomen or scutellum. 



