1918.] E. Brunetti : Oriental Tiimlidae. - 281 



Cylindrotoma distinctissima, Mg. — Auxiliary vein ends free, a 

 trace of subcostal cross vein towards but not at tip. (Extreme tip of 

 wing missing, but intact up to the point at which costal cross vein occurs 

 when present, and there is no sign of it.) 2nd and 3rd veins diverge 

 immediately" but distinctly before anterior cross vein. Antennae with 

 moderately long verticils, inconspicuous as such. Thorax quite smooth, 

 unpunctured. 



Stibaiocara 4-C3llula, Brun. — -Auxiliary vein distinctly turns 

 down into 1st vein, without weakening, no trace of a cross vein uniting 

 it with costa. 1st vein dark brown till near tip, where it turns down into 

 2tid vein, this last section of it pale yellow. A dark brown cross vein 

 (my costal cross vein) joins it to costa at the point where it suddenly 

 pales. Therefore if it is contended that in this case the 1st vein ends 

 in the costa, the pale apical section will be the marginal cross vein, 

 but the former theory strikes me as the more correct. 2nd and 3rd 

 veins diverge exactly at anterior cross vein. Thorax towards sides of 

 dorsum distinctly punctulate. Antennae very long with exceptionally 

 long and conspicuous verticils. 



Stibadocarella pristina, sp. nov.— Auxiliary vein may b? con- 

 si lered to ond ill costa wdth subcostal cross vein present, both of 

 equal strength and distinctness, though it is impossible to decide 

 with certainty which is the actual ending of the vein. The 1st 

 vein obviously turns down into the 2nd ; no trace of costal cross 

 vein. The peculiarity of this species is that the 2nd and 3rd veins 

 diverge so late, half way between anterior cross vein and wing 

 tip. The 2nd vein at point of divergence turns abruptly upwards 

 and then rather sharply outwards, the last section appearing to be 

 the end of the 1st vein, being in a straight line with it. 3rd vein 

 forming with praefurca a gently bisinuate line. Rest of veins as in 

 4-ceUula. 



Antennae in i^ as in -1-cellula ; longer than whole body ; in $ less than 

 half as long, very shortly and inconspicuously pubescent. Thorax 

 very smooth, no trace of punctulation. 



The variation of the characters in question may be summed up as 

 follows.^ 



Auxiliary vein. — Ends (1) free, with subcostal cross vein indis- 

 tinctly present {Cylindrotoma) ; or (2) ends very distinctly in the 

 1st vein without any cross vein above or below, and as three out of the 

 six genera in this section are identical in this it may be regarded as the 

 normal ending {Triogma, Liogma, Stibadocera) ; or (3) ends in costa 

 with subcostal cross vein present {StibadocereUa). It may be contended 

 in the latter case that it ends in the 1st vein, with a supernumerary 

 cr jss vein between its tip and the costa, but such a cross vein is very 

 rare in the diptera. 



1st longi^udinil vein. — Normally ends in 2nd vein.- When the 

 costal cross vein is absent this fact is unimpeachable, therefore Ender- 

 lein's contention that it ends in the costa with a cross vein between it 



^ Only the conclusions ara given here, as my full comparative notes on the genera 

 would occupy too much space. 



2 Occasional exceptions may be admitted : vide note antea p. 280, Plialacroccra. 



