CECIDOiMYIA. 125 



brownish or blackish-brown ; third, fourth, and fifth joints of the tarsi 

 snow-white. MaU. Antennte sixteen-jointed, longer by half than the 

 body; joints half the length of their petioles. Fem. Antennae thir- 

 teen-jointed, shorter by one-third than the body ; joints three times 

 the length of then- petioles. Oviduct short, retracted, with two oval 

 valves. 



Lives on decayed wood. 



149. valvata, Winn. Linn. Ent. viii. 303. 94 (1853). Foevi.flava, 

 antennis 24-articulatis pallide fuscis basi flavis corpore brevioribus, 

 articulorum petiolis abbreviatis, palpis albidis longissimis, thorace vittis 

 trlbus castaneo-fuscis, alis sublimpidis cinereo-hirtis, venis fuscescentibus, 

 oviduciu crasso, valvulls duabus apicaUhus tiigris, lamellisque duabus par- 

 vis rotundls, pedibus longissimis piceis, tarsis apice niveis. Long. 1 lin. 



Fem. Yellow. Antennae twenty-four-jointed, pale brown, yellow at 

 the base, shorter by one-third than the body ; some of the joints about 

 thrice the length of their petioles ; five or six apical joints without pe- 

 tioles. Palpi whitish, very long. Thorax with three chestnut-brown 

 stripes. Wings nearly limpid, with grey pubescence ; veins brownish ; 

 anal vein and its second branch forming an almost right angle. Abdo- 

 men clothed with hoary hairs. Oviduct long, stout, yellow, with two 

 black apical valves, between wliich is the aper'tnre of the oviduct, and two 

 very small round valves. Logs piceous, very long, whitish beneath ; 

 third, fourth, and fifth joints of the tarsi snow-white. 



Found on tlie decayed stems of Carjnmis Betula. 



150. nodicomis, Winn. Linn. Ent. viii. 300. 92 (1853). Flava, 

 antennis fuscis basi flavis, thorace vittis tribus nigro-fuscis, pectore nigri- 

 cante, alis subcinereis cinereo-pilosis, venis fuscis; iJ/os, antennis 31- 

 articulatis corpore longioribus, articulorum petiolis elongatis, halteribus 

 albis, pedibus pallide fuscescentibus, femoribus basi flavis, tarsis apice 

 niveis ; Fcem. antennis 2Q-articulatis corpore brevioribus, petiolis bre- 

 Yissirais, oviduetu elongato lamellis duabus parvis longi-ovatis, pedibus 

 nigro-fuscis, femoribus basi subtusque flavescentibus, tarsis apice niveis. 

 Long. 1-1| lin. 



Fellow. Antermpe brown. Thorax with three blackish-brown stripes. 

 Pectus blackish. Wings greyish ; transverse veinlet situate at a little 

 before two-thirds of the length of the subcostal vein ; anal vein and its 

 second branch forming a rounded, slightly obtuse angle. Male. An- 

 tennee twenty-one-jointed, longer by nearly half than the body; joints 

 and petioles of almost equal length towards the base, the latter longer 

 in the middle, but much shorter in the apical part of the antennic. 

 Fem. Antenna twenty-six-jointed, shorter by onc-tliird than the Ijody ; 

 joints about four or five times the length of the petioles. Oviduct 

 elongated, with two very small elongate-oval valves. 



Lives on decayed beech-wood. 



151. nemoralis, Winn. Linn. Ent. viii. 302. 93 (1853). Fcem. 



