i!'2i., . Kin 



c?. Head viewt'd from aljdve, with tho niiteunal |^rmiuiR-uce but 

 little projecting and the eyes krife, very narrowly separated on frons 

 by the narrow silvery orbits, and an almost linoar frontal stripe. 

 Arista microscopically pubescent. Thora.\ black, slif^htly L-'reyish 

 rijiht in front and distinctly so about humeri and notopleural depres- 

 sion ; a central dark stripe may usually be traced right in front. 

 Abdomen short ovate, ground-colour light grey when viewed right 

 from behind, first .segment very extensively darkened, second segment 

 with trapezoid dark patches longer than wide, third and fourtli seg- 

 ments with successivel narrower patches. Legs shorter and rather 

 stouter than usual. Fi'ont tibiae with no bristle behind ; middle 

 tibine with one anterodorsal and 1-2 posterodorsal bristles; hind 

 tibiae with 2 small anteroventral bristles towards tip, 2 anterodorsal, 

 and 2 smaller posterodorsal bristles. Hind femora with 4-5 antero- 

 ventral bristles on apical half and 5-6 finer long posteroventral 

 bristles on basal half. Wings conspicuously darkened, especially 

 about base. Squamae white with yellowish margins. Halteres 

 yellow, Leugth about 4 mm. 



2 . Unknown. 



Described from five specimens captured as follows : — Isle of Arran, 

 June 10th. 1882: Loch Maree (Ross and Cromarty), June Uth, 

 1884; Aviemore (Inverness), May 25th, 26th, and June 2ud, 1913. 

 The first two specimens were the representatives in the "N errall 

 Collection of L. triangulujera of the " List" Meade's triangidigera 

 had only three pairs of postsutural dorsocentral bristles, so cann<»t 

 have been the species described above, and though the true trirt»f/u- 

 lu/crti Zett. has four pairs of such bristles, it differs in having a wider 

 frons and no posteroventral bristles to hind femora. Z. muwiuln 

 must be very near to the true L. septeumotata Zett., but this latter, 

 according to Ringdahl, has no posteroventral bristles to hind femora. 

 28 (16) Halteres dusky ; aristasubplumo.se .. 10. denif/mUt ^\^. 



A very black species, standing in the British List as Spilogader 

 nigrinervis ZtL 



S . Frons at narrowest part rather wider tlian 3rd atitennal joint. 

 Face and jowls appearing black or brownish-blacK in most lights. 

 Arista subplumose. Thorax black, though, as is so often the case in 

 the genus, appearing brownish-black when viewed fix)m in front 

 with the light also from the front. Abdomen appearing black from 

 most points of view, but showing in some lights a,n inconspicuous 

 narrow greyish central stripe and greyish side-margins, but when 

 viewed right from behind the usual subquaurate black patches, very 

 variable in outline, may be traced on all segments. Front tibiae 

 with or without a bristle behind ; middle tibiae with one antero- 

 dorsal bristle (sometimes missing) and two posterodorsal bristles ; 

 hind tibiae with 2-3 small anteroventral, 1-2 stronger anterodorsal, 

 and often one small posterodorsal, bristles. Hind femora with a 

 complete anteroventral row of long bristles becoming somewhat finer 

 towards base, and 5-6 very long bristly hairs posterrtventrally on 

 basal half. AYings very strongly darkened. Squamae whitish. 

 Halteres dusky. 



Q 



