CECIDOMYIA. 121 



border, paler along the hind border. Halteres blackish-brown. Ab- 

 domen reddish. Oviduct not exserted. Legs blackish-brown, stout. 



Tlie oviduct is retracted in the preceding species of this sub- 

 genus ; in C. cornuta, Bremi, it is extended. 



138. Fagi, llartig, Jahre.sberichtei. 4 (1836); Locw; Winn. Ni- 

 (jro-fmca, capite nigro, thorace trisulcato luteribm carneis, alls subl'mi- 

 pidis ciuereo-pilosis, venis pallide fuscis, costa iiigro-fusca, halteribus 

 fulvis, ahdomine obscure cameo, femoribus basi flavescentibus ; Mas, an- 

 tennis 24-articulatis corpora longioribus, articulis longi-petiolatis ; Fcem. 

 antennis articulis 20-22 non petiolatis, oviductu fulvo brevi lamellis 

 duabus rotuudatis. Long. 2-2i lin. 



BlacJcish-hroicn. Head black. Thorax tcith three furrows, flesh- 

 colour on each side. Wiiujs nearhj limpid ; anal vein and its second 

 branches forming a slightly obtuse angle. Abdomen dull flesh-colour. 

 Femora yellowish at the base. Male. Antenuse twenty-four-jointed, 

 longer by one-fourth than the body ; joints as long as their petioles. 

 Fern. Antennee twenty- to tweuty-two-jointed, one-third of the length 

 of the body; joints not petiolated. Oviduct tawny, short, with two 

 round valves. 



Lives in the pyramidal galls on the leaves of Fagus sylvatlca. 

 These occur in great numbers on the beech-trees near Interlacken, 

 in Switzerland, and are different from the slender horn-shaped 

 galls which appear on the beech-leaves near London. (E. ?) 



139. piligera, Loew, Pr. Pos. Gymn. 32. G (1850) ; "VYinu. — an- 

 mdipes, Hartig. Nigro-fusca, palpis pallide fuscescentibus, antennis 

 I7-20-articulatis fuscescentibus, thoracis later ibus abdomineque carneis, 

 alis Uiiipidis cinereo-hirtis, venis fuscescentibus, costa nigro-fusca, hal- 

 teribus basi flavis, pedibus subtus albicantibus ; Mas, antennis corpora 

 pauUo longioribus, articulis brevi-petiolatis ; Fr£m. antennis corporis 

 dimidio non longioribus, articulis non petiolatis, oviductu elongato tlavo 

 lanielhs nullis. Long. Ij-l-^- lin. 



Blackish-brown. Antennae with eighteen or twenty joints, rarely 

 Avith seventeen joints. Thorax on each side and abdomen flesh-colour. 

 Winfjs limpid ; anal vein and its second branch forming a slightly obtuse 

 angle. Male. Antennaj a little longer than the body ; joints longer by 

 one-third than their petioles. Fem. Antenna? as long as the head and 

 the thorax together ; joints not petiolated. Oviduct elongated, yellow^, 

 without valves. 



Lives in hairy gaUs on the leaves of Fagus sylvatica. 



140. elegans, AVinn. Linn. Ent. viii. 287. 76 (1853). Mas, nigra, 

 nitida, antennis 20-articulatis fuscis corpore paullo brevioribus, arti- 

 culis longi-petiolatis, thoracis lateribus carneis, alis subcinereis cinereo- 

 pilosis, venis fuscis, halteribus basi albis, abdomine nigro-fusco incisuris 

 albis, pedibus subtus vix albicantibus. Long. \\ lin. 



Mule. Black, shining. Antennne twenty-jointed, brown, shorter by 



VOL. IV. R 



