CECIDOMYIA. 93 



the length of the body ; double joints as long as the petioles. Fern. 

 Antennae rather longer than the body ; petioles one-fourth shorter than 

 the joints. Oviduct short, with two small yellowish valves. 

 Lives in most species of Polyporus. 



49. socialis, Winn. Linn. Ent. viii. 251. 38 (1853). Foem. flava, 

 antennis pallide fuscis, thorace mttis iribus fuscis, alis subcinereis, venis 

 pallide fuscis, oviductu brevissimo lamellis duabus rotundatis. Long. -| 

 lin. 



Fern. Yellow. Antennas pale brown, as long as the body ; joints and 

 their petioles of equal length. Thorax with three brown stripes. Wings 

 greyish, with grey pubescence; veins pale brown; transverse veinlet 

 joining the middle of the subcostal vein ; cubital vein ending at almost 

 in front of the tip of the wing ; second branch of the anal vein curved 

 to the hind border. Oviduct very short, with two rounded valves. 



Lives in the woody excrescences on the branches of most species 

 of Rubus, with the larvae of Lasioptera Rubi. 



50. brevis, n. Mas, testacea, brevis, capite nigro, antennis va- 

 lidis, articulorum petiolis brevissimis, thoracis disco fnscescente, alis sub- 

 cinereis, halteribus albidis, pedibus validis testaceis. Long. J ; alar. 2 

 lin. 



Male. Testaceous, short. Head black. Antenna twelve-jointed, 

 stout, submoniliform, verticillate-pilose ; joints double, elongate, sub- 

 cylindrical, with extremely short petioles. Disc of the thorax brownish. 

 Wings hardly greyish, ciliated ; veins pale testaceous ; subcostal much 

 less than half the length of the wing ; cubital almost straight ; sub- 

 anal not apparent beyond the fork of the anal ; first branch of the anal 

 distinct, slightly curved ; second branch curved obliquely and rather 

 abruptly to the border. Halteres whitish. Legs pale testaceous, rather 

 short and stout. 



Eare. (E.) 



51. minuta, Winn. Linn. Ent. viii. 250. 37 (1853). Mas, ru- 

 fescente-flava, antennis fuscis corpora duplo longioribus basi flavis, 

 thorace mttis tribus fuscis, pectore nigricaute, alis limpidis, venis fuscis, 

 halteribus albis, pedibus fuscis subtus pallidis. Long. ~ lin. 



Male. Keddish-yelknv, with hoary hairs. Antenna brown, yellow at 

 the base, twice the length of the body. Thorax with three almost con- 

 tiguous brown stripes. Pectus blackish. Wings limpid, with blackish- 

 grey pubescence ; veins slender, brown ; transverse veinlet beyond the 

 middle of the subcostal vein ; cubital vein straight, slightly curved 

 hindward near the tip, ending at almost in front of the tip of the wing. 

 Halteres white. Legs brownish, pale beneath. 



Habits unknown. 



52. geniculata, Winn. Linn. Ent. viii. 251. 39 (1853). Mas, 

 flava, antennis fuscis corpora fere duplo longioribus, thorace fusco-tri- 

 vittato, alis limpidis, venis fuscis, abdomiue navo-fusco incisuris albidis, 



