LASTOPTEHA. 133 



a. Metatarsus short. 



b. Abdomen with yellow bands. Species 1. 



b b. Abdomen wholly black. Species 2. 

 a a. Metatarsus long. Species 3. 



1. picta, Meig. Zw. i. 89. 1 (1818) ; Winn. Picea, capite, halte- 

 ribus abdominis fasciis interruptis venti'eque flavis, antennis nigris, thora- 

 cis lateribus pectoreque fulvis, alls limpidis, tibiis apice tarsisque nigris. 

 Long. li; alar. 3 lin. 



Piceous. Head yellow. Antennae black. Thorax tawny on each side 

 and beneath. Wings limpid; veins and cilia black; costa apparently 

 thick, the costal, mediastinal, and subcostal veins being contiguous ; 

 subanal vein straight ; anal indistinctly forked, forming with its second 

 branch an extremely obtuse angle, its first branch almost obsolete. 

 Halteres yellow. Abdomen with an interrupted yellow band on each seg- 

 ment j underside yellow. Legs long, slender, yellow ; tarsi longer than 

 the tibiae ; hind tarsi about thrice the length of the tibia ; tarsi and tips 

 of the tibia3 black. 



Rare. In the British Museum. (E.) 



2. albipennis, Kl. Zw. i. 40. 5 (1804). Atra, alls limpidis apice 

 subcinereis, venis nigris, costa albo-uniguttata, pedibus piceis validiuscu- 

 lis. Long. 1|- ; alar. 3 lin. 



Deep black. Wings limpid, greyish at the tips ; veins and cilia black ; 

 costa with a white spot at the tip of the subcostal vein ; subcostal and 

 mediastinal veins distinct, separate ; subanal vein straight ; anal form- 

 ing with its second branch a slightly curved line ; first branch indis- 

 tinct, very near the anal vein. Legs piceous, rather stout, moderately 

 long ; tarsi longer than the tibia. 



Eare. In the British Museum. (E.) 



3. stygia, Hoffm. MSS. ; Meig. Zw. i. 91. 7 (1818). Obscure 

 fusca, subtus sordide flava, antennis nigris, alia nigro-cinereis pubescen- 

 tibus, venis nigris, pedibus validiusculis albidis. Long, -j ; alar. 2 lin. 



Brownish, dingy yellow beneath. AntenuaB black. Wings dark grey, 

 very thickly pubescent ; veins black ; subcostal vein distinct, ending at 

 beyond three-fourths of the length ; subanal distinct, indistinctly forked 

 towards its tip ; anal forming a very obtuse angle near its tip ; the fore 

 branch obsolete. Legs rather stout, moderately long, with whitish reflec- 

 tions ; metatarsus longer than any of the following joints. 



Eare. (E.) 



Lasioptera ~Rubi y Schr., lives in excrescences on the stems of 

 different species of Rulus, and probably is also a British species. 

 L. anricincta, Winn., lives at the roots of Festuca praten-ns, 

 changes to a pupa in a snow-white covering, and appears two 

 weeks afterwards in the fly state. 



