CHIKONOMUS. 183 



Fem. Pale testaceous, slender. Thorax slightly produced in front. 

 Wings limpid; veins testaceous, distinct. Legs slender. 

 Rare. (E.) 



137. obscurus, F. S. A. 40. 11 (1805); Meig.; Stfeg.; Zett.— 

 barhicornis, F.; ]\Ieig. Ater, alls suhlctcteis, vents albis, halteribus pedi- 

 husque nigris, femoribus pubescentibus validiusculis. Long. 1^-2 ; alar. 

 3-3i lin. 



Deep black. Wings somewhat milky -wlilte ; veins wJdte. ITalieres 

 black. Abdomen pubescent. Legs black ; femora pubescent, rather 

 stout. Male. Antennae with black plumes. 



Common. (E.) 



138. permacer, n. 3Tas et Teem, niger, gracilis, pectore ventre- 

 que cinereis, alis subcincreis, venis albidis apud costam nigris, meiatarso 

 jiostico tibia posticce bis triente longiore. Long. 2; alar. 3^-4 lin. 



Male and Fem. Black, slender. Pectus and abdomen beneath grey. 

 Wings very slightly greyish ; costal, radial, and cubital veins, and dis- 

 cal transverse veinlet black ; the other veins whitish. Abdomen rather 

 long. Legs long and slender : land metatarsus r.iore than two-thirds of 

 the length of the hind tibia. 



Not common. (E,) 



139. incalliduSy n. Mas, niger, alis subcinereis, venis albidis 

 apud costam nigris, halteribus albis, metatarso postico tibias posticce bis 

 triente breviore. Long. 2-1- ; alar. 4 lin. 



Male. Black. Antenna with black plumes. Wings very slightly 

 greyish ; costal, radial, and cubital veins, and discal transverse veinlet 

 black, the other veins whitish. Halteres white. Abdomen long, slen- 

 der. Legs long, slender. — Nearly allied to C. permacer, but loith stouter 

 legs, and the hind metatarsus is less than two-thirds of the length of the 

 hind tibia. 



Not common. (E.) 



140. obsepiens, n. Mas et Foem. niger, alis sublimpidis, venis 

 albidis, halteribus albis, abdomine 9iigro-vi7'idi, pedibus sordide albidis. 

 Long. 1| ; alar. 2| lin. 



Male and Fem. Black. TFivgs nearly limpid ; veins whitish. LTal- 

 teres white. Abdomen greenish-black. Legs dingy whitish, slender. Male. 

 Abdomen with black plumes. 



Not rare. (E.) 



141. paganicus, n. Fcem,. nigro-cinereis, alis subcinereis, venis 

 fuscis, halteribus albidis, pedibus piceis. Long, l-i; alar. 3 lin. 



Fem. greyish-black. TFings greyish ; veins brown. Halteres whitish. 

 Legs piceotis, slender. 

 Not common. (E.) 



142. oppertus, n. Mas, niger, validus, alis sublimpidis, venis halte- 



