Insecutor Inscitiae Menstruus 



Vol. I FEBRUARY, 1913 No. 2 



SOME NEOTROPICAL SYRPH1D>E 



(Diptera) 

 By FREDERICK KNAB 



Quichuana, new genus. 



In the majority of characters and in appearance agreeing with Elophi- 

 lus; differs in the hairy eyes, narrower front, and the more prominent 

 antennae with elongate third joint. 



Wings with the marginal cell open, anterior cross-vein beyond middle 

 of discal cell, third vein with a deep loop into first posterior cell. Anten- 

 nae prominently inserted, third joint elongate, flattened, p2u:allel-sided, at 

 least twice as long as broad, rounded at apex ; tirista bare, inserted close 

 to base. Abdomen depressed, broad throughout. Hind femora much 

 thickened, without distinct tooth ; hind tibiae arcuate. 



Approaches nearest to M^iathropa Rondani (type Musca florea 

 Linne), but differs from it in the elongate third antennal joint, the incras- 

 sate femora and strongly arcuate tibiae of the hind legs. Only femjJes 

 are before me and in these the frons agrees in shape with Myiathropa. 

 If my suspicions that Mallota championi Williston (Biol. Centr. Amer., 

 Dipt., vol. 3, p. 69, 1902) belongs here are correct, the male has the 

 eyes contiguous as in Myiathropa. Although the present genus seems 

 rather weakly defined I have preferred creating it, rather than assign the 

 insects in question to a genus with which some of the characters conflict 

 and thereby add to the already existing confusion. 



Type : Quichuana syloicola, new species. 



Quichuana sylvicola, new species. 



Female : Antennae inserted above middle of head, their insertion well 

 produced. Frons narrow at vertex, not exceeding the width of oceUar 



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