HIPPOBOSCIDAE. 



19 



metaepimeron (text-fig. 6c) with a small cluster of setae ; legs presenting no 

 distinctive characters ; wings (text-fig. 6a) with the veins rather pale, and with 

 the setulae confined to the outer half of the wing except along the anterior 

 border. 



Text-fig. 6. — Lyucliia samoana, n.sp. ; a, wing; b, clypeal region; c, metaepimeron, and 

 region about haltere and metatboracic spiracle. 



Abdomen with the usual narrow basal plate on the dorsal side, this closely 

 followed by a small median plate, and with a narrow, apical transverse plate. 

 Median region of the dorsum with the area of fine transverse striations, which 

 is characteristic of the group to which this sjjecies belongs, this area almost 

 destitute of setae. Remainder of abdomen, both dorsally and ventrally, beset 

 with small setae which are not borne upon chitinised tubercles. 



Male. — In all respects very closely resembling the female, dift'ering only in 

 the two small external flaps of the genitalia. Internal genitalia very small 

 (detailed structure impossible to work out from the single specimen available). 



Notes. — The apparently very numerous species of this group are chiefly 

 distinguishable by difi'erences in the characters to which attention has been called 

 in the preceding description. It would be useless to attempt any statement 

 as to the nearest affinities of this form. 



