CLUSIIDAE (HETEEONEURIDAE) AND SAPROMYZIDAE. 



209 



and Hopldns) ; paratype 9, and 1 paratype pair in copula, same locality, 

 25.ix.1923 and 24.ix.1923 respectively (Swezey and Wilder). 



In Tahiti there is a somewhat larger species, very closely related to this but 

 distinguished by structural differences. It is still undescribed, but I hope very 

 shortly to include it in a report on material from that region. 



9. Homoneura (Minettioides) nigricauda, sp. n. (Text-fig. 4). 



This and the two following species are very similar in colour and general 

 habitus. A description of the present species will suffice for the others, of 

 which only distinguishing characters will be mentioned. 



Shining orange-yellow. Frons as in H. anthracina, dull, slightly darker 

 in the centre ; longest hairs on arista about three times as long as its basal 

 diameter. Thorax as in H. anthracina, but with about eight series of intra- 

 dorsocentral hairs, and no well-developed acrostichals except prescutellar pair. 

 Abdomen with three series of black, more or less triangular marks, varying much 

 in intensity and development, central series sometimes indistinct and lateral 

 ones and apical fascia much reduced ; in darker examples black markings 

 forming three broad, complete vittae from near base to apex of abdomen. 

 Hypopygium as in text-fig. 4, generally black or fuscous, rarely yellow^ in part. 

 Legs yellow ; fore femur with preapical anteroventral series of setulae very 

 fine and hair-like, almost undeveloped ; all tibiae with preapical dorsal bristle. 

 Wings as in H. anthracina, yellowish hyaline. Halteres yellow. 

 VI. 4 3 



3 



Text-fig. 3. — Homoneura anthracina, sp. n. ^ hypopygium. 

 Text-fig. 4. — Homoneura nigricauda, ,, ,, ,, 

 Text-fig. 5. — Homoneura apiseriata, ,, ,, ,, 



