DICRANOTA. 305 



52. filata, n. Caua, gracillima, palpis antennisque nigris, alls sub- 

 cinereis perangustis, abdomine nigro-cinereo, pedibus nigris, femoribus 

 basi fulvis. Long. 3 ; alar. 6 liii. 



Hoary, very slender. Palpi and antennae black. Wings greyish, 

 very narrow ; veins black, testaceous at the base ; stigma obsolete. 

 Halteres testaceous. Abdomen long, blackish-grey. Legs black ; fe- 

 mora tawny at the base. 



Not common. (E.) 



SECTION 25. 



Mediastinal vein ending at a little beyond two-thirds of the length 

 of the wing ; radial ending at beyond three-fourths of the length ; ra- 

 dial and cubital springing from a common petiole, which they exceed 

 in length, and which proceeds from the subcostal at somewhat beyond 

 two-thirds of the length of the wing ; radial forked at one-fourth of 

 its length, connected by a veinlet at its fork with the subcostal ; cubital 

 connected near its base with the third externo-medial by a veinlet, 

 which is opposite the veinlet which connects the third externo-medial 

 with the subanal, and whose angle emits a vein, which is the common 

 petiole of the first and second externo-medial ; the two latter being 

 about twice the length of their petiole. Resembles the Eriopterte. 



53. diuturna, Walk. C. D. B. M. i. 54 (1848). Var. apparens, 

 Walk. Teem, nigro-cinerea, antennis basi thoracisque lateribus testa- 

 ceis, alis subcinereis, stigmate fuscescente, veuis nigris basi testaceis, 

 halteribus abdominis apice pedibusque testaceis. Long. 3-3 J; alar. 

 6-7 lin. 



Fern. Blackish-grey. Antennae longer than the head, testaceous at 

 the base. Sides of the thorax and tip of the abdomen testaceous. 

 Wings slightly greyish ; stigma pale brown ; veins black, testaceous at 

 the base. Halteres and legs testaceous, the latter slender. 



Not common. (E.) 



Genus VI. DICRANOTA. 



DICRANOTA, Zett. Dipt. Scand. x. 4033 (1851). Limnobia p., Schumm.; 

 Hal. ; Zett. I. L. 



Corpus elongatum, angustum, sublineare. Caput parvum, rotundatum. 

 Oculi laterales, rotundi. Rostrum breve. Proboscis non elongata. 

 Palpi exserti, oylindrici, incurvi, 4-articulati, articulis subaequalibus. 

 Antennae 13-articulatae, subfiliformes ; articulus primus breviusculus, 

 cylindricus ; secundus brevior, cyathiformis. Abdomen lineare. 

 Pedes elongati, graciles, nudi ; tibiae calcaribus exiguis. Mas. An- 

 tennae thorace paullo longiores ; articuli ovales. Abdomen depres- 

 sum ; anus parvus, obtusus, parum subclavatus. Fcem. Antennae 

 thorace paullo breviores ; articuli rotundati. Abdomen subcylindri- 

 cum ; anus sat acutus, stylis duobus subulatis, leviter recurvis. 



VOL. IV. 2 Jl 



