184 



PSYCHE. 



[January- 1895. 



the bristles short and confined to the sides 

 and posterior margin. Scutellura with 

 bristles. Abdomen shorter than the wings, 

 flattened; ovipositor telescopic, projecting; 

 hjpopygium largely concealed. Legs stout; 

 all the femora thickened. Auxiliary vein of 

 the wings well-developed, elongate, I'eaching 

 nearly to the middle; basal cells large; last 

 section of the fourth vein oblique, the first 

 posterior cell nearly' closed before the tip of 

 the wing. All the tibiae with a preapical 

 bristle, the middle tibiae only, with spurs. 



Among the five species from wliich 

 tliese characters are derived, there is a 

 considerable variation in other struct- 

 ural characters, of sufficient importance, 

 I believe, to render the dismemberment 

 of the genus Rhopalomera of Weide- 

 mann advisable, as follows : — 



Rhopalomera Wiedemann, Analecta En- 

 tom. 1824. 

 A pair of posterior ocellar bristles present; 

 no frontal bristles; face tuberculate; anten- 



1. Wings brownish black 

 Wings with distinct markings 

 Wings without distinct markings 



2. Wings with numerous small spots 

 Wings with fewer, larger spots 



nae not inserted under a frontal projection; 

 arista bare or plumose ; scutellum pyramidal, 

 directed obliquely upwards. Wings spotted 

 (unspotted in R. cilia/a). 



Rhopalomvia, gen. nov. 



Posterior ocellar bristles present; two 

 short frontal bristles on each side ; antennae 

 inserted under a projection of the front; 

 arista plumose ; face carinate ; scutellum oval, 

 not prominent ; hind tibiae dilated and with 

 tubercles. 



Apophorhynchus, gen. nov. 

 No ocellar or frontal bristles; antennae 

 not inserted under an angle of the front; 

 face tuberculate ; arista plumose; scutellum 

 oval; hind tibiae slender. 



In the following table I have en- 

 deavored to include all the valid or 

 recognizable species now known, 

 belonging to these three genera, though 

 it must be remembered that some of 

 them are unknown to me. 



RJiopalomera fonorata 



Rhopalomera itiaailipeiinis 



■' ■ ■ • -3 



3. Wings clouded with brown along the veins . Rhopalomera Jlaviceps 

 Wings brown and hyaline, spotted, with dark brown clouds on the cross-veins 



Rhopalo7nera clavipes, tibialis 

 Wings hyaline and yellowish, with brown clouds Rhopalomera stictica. 



4. Antennae and palpi yellow ; hinil tibiae broad . . . varipes. 

 Not such species . . . . . . . . '. 5 



5. Scutellum pj'ramidal ; hind tibiae densely ciliate ; arista bare. 



Rhopalomera ciliata, n. sp 

 Scutellum oval ........... 6 



6. Hind tibiae dilated 



Hind tibiae slender, arcuate 



Rhopalomyia pi euro punctata 

 Apophorhynchus flavidus, n. sp 



