142 BIBIONID/E. 



sewers, from the spring to the autamn, and occasionallj dwells in 

 clusters beneath the bark of pales. (E. S. I.) 



3. biiilata, Hal. MSS. Nigra, thorace par urn nitldo subtilismne 

 pallido pitbescente, pedibiis nigro-fuscis, tibiis luteis apice (tibiis posticls 

 etiam annulo medio) nigricautibns, alis hyalinis, radice, lineola ante alas 

 et puiicto infra (Iioc obscurius) flavis, venis costaU subcostali et radiali 

 pallide flavis, ca3teris decoloribus, halteribus flavidis ; Mas, abdomine 

 apice valvuUs 2 subfalcatis nigris, filis 2 erectis pallidis tarso postico 

 longioribus, altero paullo lougiore apice setaceo, altero obtuso ; Teem. 

 abdominis apice valvulis compressis obtusis, autennis articulis discretis. 

 Long, fere 1^ ; alar, fere 4 lin. 



Black. Thorax loith very fine pale pubescence, slightly shbiing . TFitigs 

 limpid ; primary veins pale yellow, the rest colourless, ilalteres yel- 

 lowish. Legs piceous black ; libire luteous, with blackish tips ; hind 

 tibice with a blackish band across the middle. Male. Abdomen with two 

 subfalcate apical valves. Fern. Joints of the auteiaife not crowded to- 

 gether. Abdomen with two apical, obtuse, compressed valves, and 

 with two long apical setse ; one setaceous at the tip, rather longer than 

 the other, which is obtuse. 



Rare. In Mr. Haliday^s collection. (I.) 



3. consimilis, Hal. MSS. Nigra, nitida, antenuis brevioribus quam 

 S. notata, alis hyalinis, vena costali pallide flava, subcostali et radiali 

 adhuc pallidioribus, ca^teris decoloribus, halteribus albidis, venis de- 

 cursu fere qualibus S. sciitellatce , modo racUali costa parallela quam 

 attingit flexu subito (abruptius quam S. notata), porro vena radiali 

 paullo propiore ab apice vense subcostalis, et areola subcostalis fere an- 

 gustiore, pedibus piceis, tibiis basi luteis. Long, vix 1 ; alar. 2| lin. 



Black, shining. Antennae shorter than in 8. notata. Thorax narrow, 

 compressed. Wings limpid ; primary veins yellow. Halteres whitish. 

 Legs piceous ; tibits luteous at the base. 



Not rare on Umbelliferce. In Mr. Haliday's collection. (I.) 



4. flavicoUis, Meig. Zw. i. 302. 8 (1818) ; Mcq. ; Gim. ; Loew ; 

 Zett. — ochracea, Meig. Fulva, capite anteniiisque nigris, alis sublim- 

 pidis, venis albis apud costam fulvis, abdominis dorso nigro ; var. (3. 

 thoracis dorso nigro. Long. 1-li ; alar. 3-3^ lin. 



Taicny. Head and antenufe black. "Wings nearly limpid ; costal, 

 subcostal, and radial veins tawny, the^rest white ; subcostal vein ending 

 at very much beyond one-third of the length of the wing ; radial ending 

 with the costal at much beyond two-thirds of the length; subapical 

 with very long forks. Abdomen black above, excepting the hind 

 borders of the segments. — Var. /3. disc of the thorax black. 



Appears in the autumn ; frequents the tlowers of the Ivy, and 

 often appears on the Oak and on the Larch, amongst swarms of 

 S. plcea, feeding on the lioneydew of Aphis Roboris and of xl. 

 Laricls. (E. L) 



