DICRANOTA, 3()o 



52. filata, n. Caua, gracillima, palpis anleimisque iiigris, alis siib- 

 ciuereis perangustis, abdomine iiigro-cinereo, pcdibus nigris, fcmoribiis 

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



Hoary, very slender. Palpi and antenna; 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. (11.) 



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-mcdial by a veinlet, 

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

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

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

 about twice the length of their petiole. — Resembles the Eriopterce. 



53. diuturna. Walk. C. D. B. M. i. 54 (1848).— Var. ajjparens. 

 Walk. Fcem. nigro-cinerea, antennis basi thoraeisque lateribus testa- 

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

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

 6-7 lin. 



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

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

 W'ings slightly greyish ; stigma pale brown ; veins black, testaceous at 

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



Not common. (E.) 



Genus VL DICRANOTA. 



DiCRANOTA, Zett. Dipt. Scand. x. 4033 (1S51). Limnobia p., Schunim.; 

 Hal. ; Zett. L L. 



Corpus elongatum, angustum, sublincare. (,'aput parvum, rotundatuni. 

 Oculi lateralcs, rotundi. Bostrum breve. Proboscis non elongata. 

 Palpi exserti, eylindrici, incurvi, 4-articulati, articulis subajqualibus. 

 Antennai 13-articulat!c, sulifiiiformes ; articulus primus breviusculus, 

 cylindricus ; secundus brevior, cyathiformis. Abdomen lincare. 

 Pedes elongati, graciles, nudi ; tibiic calcaribus exiguis. Mas. Au- 

 tennse thorace pauUo longiores ; articuli ovales. Abdomen depres- 

 sum ; anus parvus, obtusus, parnm siibclavatus. Fa?m. Antennoe 

 thorace pauUo breviores ; articuli rotundati. Abdomen snbcylindri- 

 cum ; anus sat acutus, stylis diu)bu3 subulatis, leviter recurvis. 



VOL. IV. " 2 il 



