86 CECIDOMYZID^. 



basi flavis, thoracis disco pallide fusco, alls limpidis, costa nigro-fusca, 

 venis fuscis, halteribus albidis, abdominis segmentorum marginibus pos- 

 ticis fusco-pilosis, pedibus pallide fuscis subtus albo-flavis. Long, f lin. 



Fern. Pale yellow, or whitish. Antenna sixteen -jointed, half the 

 length of the body. Wrings limpid, with grey pubescence ; subcostal 

 vein near the costa ; transverse veinlet pale, but distinct, joining the 

 middle of the subcostal vein ; cubital almost straight from its junction 

 with the veinlet to its tip, which joins the costa at some little distance 

 from the tip of the wing ; second branch of the anal vein curved to 

 the hind border. Oviduct elongated, whitish-yellow, without valves. 



Lives in the thickened, almost subterraneous stalks of Galeob- 

 dolon luteum. 



27. obfuscata, Meig. Zw. i. 90. 5 (1818). Testacea, capite an- 

 tennisque nigris, thoracis disco fusco, alls hyalinis cinereo-pubescentibus, 

 costa venaque cubitali nigricantibus, tibiis tarsisque fusco fasciatis. 

 Long. i- ; alar. li-2 lin. 



Testaceous. Head and antennae black. Disc of the thorax brown. 

 Wings hyaline, with grey pubescence; costa and cubital vein blackish. 

 Legs with whitish reflections ; tibiae and tarsi with brown bands. Male. 

 Joints of the antennas petiolated. Fern. Joints of the antennae sessile. 



Not rare. (E.) The larva has been observed by M. Kalteri- 

 bach to feed on the thistle. Meigen includes this species with. 

 Lasioptera, but it seems to be nearer allied to Cecidomym. 



28. Galii, Winn. MSS. ; Loew, Pr. Pos. Gymn. 37. 43 (1850) ; 

 Winn. Linn. Ent. viii. 235. 22 (1853). Flava, capite nigro-cinereo, 

 antice palpisque sordide flavis, antennis pallide fuscis 16-17-articulatis, 

 thorace vittis tribus nigro-fuscis, pectore nigricante, alis amplis limpidis, 

 costa venisque nigris, halteribus fuscis basi flavis, abdomine fulvo fasciis 

 nigris, pedibus fuscis subtus albidis. Long, -f- lin. 



Wings limpid ; transverse veinlet pale, situate at before the middle 

 of the subcostal vein ; cubital vein curved hindward, joining the costa 

 at a moderate distance from the tip of the wing. Male. Antennae 

 seventeen-jointed, rather shorter than the body ; joints and their peti- 

 oles of equal length ; second branch of the anal vein curved towards 

 the hind border. Fern. Antennae sixteen- to seventeen-jointed, half the 

 length of the body ; second branch of the anal vein forming an obtuse 

 angle. Oviduct long, yellow, without valves. 



Lives in the blister-like galls of the deformed flower-stalks of 

 Galium uliginosum and G. Mollugo, and enters the earth for its 

 transformation. 



29. pratorum, Winn. Linn. Ent. viii. 237. 23 (1853). Fcem. 

 fulva, antennis 15-articulatis, thorace fusco-trivittato, alis flavescentibus, 

 venis fuscescentibus, costa nigro-fusca, halteribus albis, pedibus pallide 

 flavescentibus (in mortuis subpiceis). Long. -| lin. 



Fern. Tawny. Antennae brownish -yellow, fifteen -jointed, half the 



