MACROCEKA. 69 



siibanal forked at ouotliircl of the length, its hind fork curved hindvvard, 

 and diverging very much from the fore one ; anal extending to the 

 bind border; subaxillary none; humeral veinlet very near the base; 

 areolets thirteen, — the humeral, the radical, the subcostal, the radial, 

 the praebrachial, which is united to the pobi'achial and shortened 

 towards the tip, two cubital, three externo-medial, the subapical, the 

 anal, and the axillary. Posterior margin forming a very slight nearly 

 right angle, at more than thrice the length of the humeral areolet from 

 the base. Halteres short. Abdomen linear, or nearly linear, thrice or 

 four times the length of the body. Legs long, slender ; tihice tvithout 

 spurs; their spurs verg small. Male. Antennae longer than of the female, 

 pilose at the tips. Abdomen cylindrical. Fem. Antennee shorter. Ab- 

 domen elongate, fusiform. 



The Mucrocercc are the most elegant of all the flies of this 

 family of Dryads, They inhabit woods, are especially fond of the 

 shade, and may be often found resting on palings, with their long 

 antennae extended. Synopsis of the species : — 



a. Antennee twice or thrice the length of the body. 

 h. ^Vings unspotted. 



c. Thorax striped. Species 1. 



c c. Thorax not striped. Species 2. 

 h b. Wings spotted. 



c. Tips of the wings not clouded. 



(/. Thorax not striped. Species 3. 

 d d. Thorax striped. Species 4. 

 c c. Tips of the wings clouded. 



d. Wings striped between the tip of the radial vein and the fork 

 of the cubital vein. Species 5. 



d d. AYings striped before the tip of the radial vein. Species 6. 

 a a. Antenna; not longer than the body. Species 7. 



1. vittata, Meig. Zw. vi. 293. 7 (1830); 7.Q.ii.—dorsalis, Curt. 

 Fulva, subtus testacea, palpis, halteribus pedibusque testaceis, antcnnis 

 nigricantibus basi fulvis, thorace fcrrugineo-trivittato, alls subtestaceis, 

 abdoraine vitta dorsali nigra, tarsis fuscis. Long. 3-4 ; alar. 6-8 lin. 



Tawny, testaceous beneath. Palpi testaceous. Antenna; blackish, 

 tawny at the base. Thorax with three ferruginous stripes, the lateral 

 pair short. Wings with a very sligiit testaceous tinge. Halteres tes- 

 taceous. Abdomen with a black dorsal stripe. Legs pale testaceous; 

 tibife rather darker than the femora ; tarsi brown. 



Not rare. (E.) 



2. lutea, Panz. Faun. Germ. cv. 7; Meig. Zw. i. 223. 1 (1818); 

 Curt.; Mcc[.; Zett.; Gim.; Sta;g. Testacea, antcnnis tarsiscpic fusces- 

 centibus, iUis basi testaceis, alls subcinereis ; Mas, abdominis apice 

 fuscesccnte. Long 2-3 ; alar. 4-6 lin. — Yar. Abilomen fuscesceiis, 

 fasciis testaceis. 



