57G Mr. J. R. Mallocli on Exotic Muscaiidae. 



dorsal surface ; median two bristles on 



each orbit very close to<>etlier Pyyojihora, Scliiner. 



Hind tibia with one median postero-dursal 



bristle; bristling of orbits normal Coeiiosia, Meigen, pt. 



10, Hind tibia ^vitll two very long bristles at 



middle, the bases of which are very close 



together, one on the autero-dorsal and 



the other on the anterior or antero- 



ventral surface Caricea, Rob.-Desv. 



Hind tibia with one long strong bristle on 



autero-dorsal and a weaker bristle on the 



antero-ventral surface, the latter nearer 



apex than than the former Coetwsia, Meigen, pt. 



Hind tibia with two antero-dorsal and two 



antero-ventral bristles near middle ; 



lower calyptra hardly produced Schceiiomyza, Haliday. 



Key to Species o/Coenosia and Caricea. 



1. Legs black; fore and mid coxaj whitish; 



auteunse pale yellow alhicoxa, Stein. 



Legs black, at most the bases of tibiae nar- 

 rowly yellowish 2. 



Legs yellow ; if largely black, the tibiae 

 are always yellow at least at bases, and 

 the feuu)ra are usually basally, always so 

 if the tibife are blackened apically 14. 



2. llalteres black or dark brown 3. 



Halteres yellow 7. 



3. Arista distinctly short-haired on basal half; 



calyptrae whitish ; antennae black nodosa, Stein. 



Arista pubescent or bare 4. 



4. Third autennal segment yellow ; without a 



sharp upper anterior angle at apex ; 



calyptrae whitish , . canifrons, Stein. 



Antennae black 5. 



5. Calyptras whitish ; antennas with a pointed 



upper angle at tip ; frons seen from in 

 front with dense whitish pruinescence . , prceacuta, Stein. 

 Calyptrae brown or fuscous 6. 



6. Frons seen from in front densely white 



pruinescent nive(fro7is, Stein. 



Frons seen from in front black or grey .... fiimisquama, Steiu. 



7. Arista with short pubescence or nearly 



bare ; calyptrae very unequal in size ; 

 frons densely whitish-grey pruinescent. . 8. 

 Arista with distinct but not ^ery long 

 hairs ; frons not densely whitish-grey 

 pruinescent 9. 



8. Abdomen with a dorso-central vitta and 



paired spots on dorsum black; legs 



black planifrons, Steiu. 



Abdomen grey pruinescent, immaculate; 



knees yellow diluta, Stein. 



9. Wiugs whitisli on ba.sal half, more or less 



conspicuously blackened on apical half; 



