188 CHIRONOMID^. 



Abdomen black, cinereous beneath. Legs tawny ^ long, slender ; tarsi and 

 tips of the tibia black. 

 Eare. (E.) 



163. obtexens, n. Fcem. canus, thovace vittis tribiis nigris, alls 

 cinereis, venis lialterib usque albidis. Mis apud costam nigris, abdomine 

 cinereo subtus testaceo, seginentorum marginibas ])Osticis albidis, i^edibus 

 nigro-fuscis. Long. 2i ; alar. 7 lin. 



Fern. Hoary. Thorax with three black stripes. Wings long, grey ; 

 costal, radial, and cubital veins, and discal transverse veinlet black, 

 the rest whitish. Halteres whitish. Abdomen cinereous, testaceous be- 

 neath ; hind borders of the segments whitish. Legs blackish-broivn, long, 

 slender. 



Not common. (E.) 



164. deproperans, n. Foem. canus, thorace vittis tribus nigris, 

 alis subcinereis, venis pallide fuscis apud costam obscurioribus, halteribus 

 albidis, abdomine nigro subtus fuscescente, segmenlisflavo-fusciatis, pedihus 

 nigris. Long. \\ ; alar. 3 lin. 



Fem. Black. Thorax hoary, with three black stripes. Wings grey- 

 ish ; costal, radial, and cubital veins, and discal transverse veinlet dark 

 brown, the other veins pale broion. Halteres whitish. Abdomen brownish 

 beneath ; a yellow band on the hind border of each segment. Legs black, 

 stout. 



Not commou. (E.) 



165. obsistens, n. Mas, canus, thorace vittis tribus vix con- 

 spicuis nigris, alis subcinereis, venis fuscescentibus apud costam nigris, 

 halteribus albidis, pedibus validis. Long. 1|- ; alar. 3 lin. 



Male. Black. Antennae with black plumes. Thorax hoary, with 

 three indistinct black stripes. Wings greyish ; costal, radial, and cu- 

 bital veins black, the other veins brotvnish. Halteres whitish. Legs 

 stout, moderately long. 



Not common. (E.) 



166. pertractuSj n. Alas, canus, thorace vittis tribus nigris, alis 

 cinereis, venis albidis, halteribus albis, abdomine nigro-cinereo suturis 

 albidis, pedibus piceis attenuatis. Long. 2-| ; alar. 4 lin. 



Male, lioary, slender. Thorax with three black stripes. Wings 

 grey ; veins whitish. Halteres white. Abdomen cinereous-black ; sutures 

 lohilish. Legs picemis, rather long and slender. 



Not common. (E.) 



167. moturus, n. Mas et Foem. cinereus, thorace vittis tribus 

 nigris, alis suljlimpidis, venis albidis apud costam tcstaccis, halteribus 

 albis, abdomine nigro, segraentoi'um marginibus posticis cinereis, 2'^di- 

 hus nigris, femoribus validiusculis. Long. 1^ ; alar. 3 lin. 



(rrey. Thorax with three black .^tripes. Wings nearly limpid ; cos- 

 tal, radial, and cubital veiifs testaceous, the rest whitish. Halteres 



