AKT. 6 NOTES ON ORIENTAL SAPEOMYZID FLIES MALLOCH 69 



The most striking character of this and the next three species lies 

 in the elongate thickening of fifth vein at base of its penultimate 

 section, which thickened part is furnished with microscopic hairs 

 below. Other outstanding features of all four are the strong postocu- 

 lar ciHae, the strong lower occipital bristles, and strong bristly setulae 

 below the level of humeral bristle. These are the only four species 

 known to me which possess the above-mentioned characters of 

 venation. 



Male hypopygium as Figure 58. 



Locality.— V>oi\\ sexes, Mount Maquiling, Luzon, and one male, 

 Dapitan, Mindanao (C. F. Baker). I have examined the type speci- 

 men from Sumatra. 



HOMONEURA (HOMONEURA) INTERMEDIA, new species 



Male. — Differs from padangensis only in having the apices of veins 

 3 and 4 almost without brown clouding, and in the structure of the 

 hypopygium (Fig. 59). 



Type.— Cat. No. 41152, U.S.N.M. Dapitan, Mindanao ; four para- 

 types, Mount Maquiling, Luzon (C. F. Baker). 



HOMONEURA (HOMONEURA) COSTALIS, new species 



Female. — Shining testaceous yellow. Oceller spot not darkened. 

 Abdomen with a large black spot in center of tergites 5 to 7, 

 inclusive. Wing with a broad dark-brown cloud on costa, rather 

 faint proximad of apex of first vein, ifrom there to almost over outer 

 cross vein, extending almost to third vein, and from the latter point 

 extending over entire first posterior cell and faintly into apex of 

 second, except for a small oblong area on third vein beyond outer 

 cross vein, and connecting with a dark spot over upper extremity 

 of outer cross vein. 



Frons a little longer than wide; orbits shining, the two pairs of 

 orbital bristles long and strong ; ocellars shorter and weaker than the 

 postverticals ; inner verticals very long; arista plumose. Thorax 

 normal. Fore femur with an anteroventral comb; mid femur with 

 some fine postero ventral bristles ; hind »f emur with a series of similar 

 hair-like anteroventral bristles. Fifth wing vein with an elongate 

 swelling at base which is microscopically haired below; inner cross 

 vein at about two-fifths from base of discal cell ; ultimate section of 

 fourth vein not much longer than penultimate section. 



Length, 5 mm. 



^'ype. — Cat. No. 41133, U.S.N.M. Type and one paratype.^ Mount 

 Maquiling, Luzon (C. F. Baker). 



This species is readily distinguished from the other three known 

 to me in which the fifth vein is swollen at base by the very much 



