274 ^Ir. J. R. Mallocli on Exotic Muscari(la\ 



Dimoryhia jlavithorax, sp. n. 



Female. — Head black, face brownish, frous witli grey 

 pruinesceiice, face silvery ; anteuiific and palpi yellow, but not 

 so clear as in j/avicoruis. Thorax entirely yellow, the dorsiini 

 with the vittiTC indicated by whitish pruiiicsccnce, which is 

 visible anteriorly when viewed from above and behind. 

 Abdomen yeUow, largely infuscated above. Legs yellow, 

 tarsi brownish. Wings slightly yellowish. Calyptne and 

 hal teres yellow. 



Frous a little less than one-third of the head-width ; 

 longest hairs on arista about twice as long as width of third 

 antennal segment. Fore tibia Avithout a median bristle ; 

 mid-tibia with two or three posterior bristles ; hind tibia 

 with one antero-ventral and one antero-dorsal bristle. Apex 

 of first posterior cell nearly as wide as that cell at outer 

 cross-vein. 



Length 6-8 mm. 



Type, Malvern, Natal, vi. 1897 (G. ^. K. Marshall). Para- 

 type, Masai Reserve, B.E.A., 13. v. 1913 {T. J. Anderson). 



The first posterior cell in Jiavicornis is much narrower at 

 apex than in jlavithorax ; in tristis it is about as wide as in 

 the latter. 



Helina, Robineau-Desvoidy. 



It appears to me pertinent to indicate that the above 

 generic name is that which covers most of tlie exotic 

 Muscaridse described by Stein as belonging to the genus 

 MydcBU. The latter genus Avhen limited in scope to contain 

 only those species which agree in ciiaracters with the geno- 

 type, jjagana, Fabricius, is found to be confined to the 

 northern half of the two hemispheres — at least, so far as I 

 have been able to discover. The closely related genus 

 Myiospila, R.-D., which is doubtfully distinct, occurs much 

 farther south ; I have seen species of this genus from 

 Australia and South America. Many of Stein's species 

 originally described in Mydaa do not find their true affinities 

 in Helina either, and new genera have been erected for their 

 reception, some of them in this series of papers. 



Helina fuscojlava, sp. n. 



Female. — Head testaceous yellow, frons red, upper half 

 velvety black, orbits greyish pruinescent ; third antennal 

 segment black, except at base ; palpi rufous. Thorax 



