1G4 ctktid.t:. 



bluntly truncate lip ; 3i d elongate lance-sliaped, bare, shining, 

 produced into a long style, which is longer tlian the entire 

 antenna. Thorax and abdomen densely pubescent. Legs of 

 moderate length, simple, Winr/s with auxiliary vein ending 

 about middle of costa ; 1st longitudinal ending towards wing-tip, 

 ne!ii-]y straight; 2nd starting soon after humeral cross-vein, 

 nearly parallel with 1st, both slightly upturned at tips; 3rd 

 beginning immediately beyond base of 2nd, descending in a 

 straight .ine diagonally across the wing, forking abruptly beyond 

 its middle, the two branches curving upwards, practically parallel, 

 ending above wing-tip; 2nd subniarginal cell truncate at base; 

 anterior cross-vein just beyond origin of 3rd vein, very near base 

 of discal cell, short ; upper branch of 4th longitudinal vein 

 forked at tip of discal cell, at which point a short transvei'se vein 

 connects with the forking of the 3rd vein ; lower branch of 4th 

 vein simple, suddenly recurrent towards tip, ending jointly with 

 u|)per branch of 5th vein at about middle of hind border of wing ; 

 di^cal cross-vein long, closing discal cell ; 5th vein forked at half 

 its length ; upper branch meeting 4th vein at middle of discal 

 cell ; lower branch closing anal cell well before margin ; posterior 

 cross-vein absent, axillary vein foreshortened. Two submarginal 

 cells ; five posterior cells, 1st divided by a transverse vein,* 4th 

 closed. Squamse veiy large. 



Rnnge. Europe, India, Australia, North and South America. 



Life-Jiistorii apparently unknown. 



The present description is built up mainly on L. aurata^ as the 

 genus does not appear to have been diagnosed since Wiedemann 

 founded it. Some of the characters herein given may require 

 modification, as no other species is available for comparison. 



125. Lasia aurata, sp. nov. 



Head with vertical triangle black, roughened, elevated, with 

 long chrome-yellow, rather drooping, bristly hairs; eyes black, 

 facets very small, of uniform size, with no trace of any transverse 

 channels across the discs; frontal triangle elevated, black, shining, 

 bare. Antennal 1st and 2nd joints bright yellow, short; 2nd 



* In liis 7iotea on the genus Lai^ia (Brit. Flies, v, p. 450) Verrall distinctly 

 states that tlie extra cell " is a second porlion of the upper basal cell and iwt -a 

 basal [lart of tlie 1st posterior cell," and he compares the venation with that 

 of the NioiESTarNiDyK, but I venture to think that the anterior cross-vein (also 

 recognised by Verrall as such) cannot be placed in the basal ceil, but must, 

 when present, invariably divide the 1st basal from the 1st posterior cell. It 

 seems to me that tlio short, cross-vein connecting the ord and 4th veins in 

 Lasia and one or two other genera in this fauiily {Kid.07irJins, Ptempextis, 

 etc.), represents the ]ioint at which in the NEMESTRiNin-E the 3rd and 4tli veins 

 anastomose, wliicli in tliat family occurs in contact with the discal cell and 

 not distinctly beyond it as in CvRTiDiE. Even if in Nemestrinid^ this 

 usually punctiform contact is replaced by a shoit cross-vein, it should be 

 regarded as identical with the same extra cross-vein in Cvrtid.e and 

 not as the anterior cross-vein, which would, therefore, be wholly absent in 



NeMESTR!NII)/K. 



