Ee^ HETEROCLITiE. 



observed. The larva is probably to be looked for in running 

 waters. 



" The other genus Bixa, referred by Meigen and Zetterstedt to 

 the MycetophiUda, by Macquart, Westwood and Loew to the 

 Tipulida, and by Eondani to his TricJiocerina (a subdivision of 

 the latter group), differs from the first by the want of ocelli, from 

 the latter by the undivided mesonotum, deep mesosternum, pecti- 

 nated ungues of anterior legs, broad, rounded tentacles of the 

 vagina, etc., and may be considered of dubious place, until the 

 characters of the larva are known. Westwood (Mod. Class, ii. 

 527, note) and Haliday have indeed supposed that Degeer's figures, 

 Mem. torn. vi. pi. 24. f. 1-11, are meant to represent a Bixa 

 and its metamorphosis; but although the setaceous antennae, 

 slender legs, and conspicuous forked vein near the tip of the wing 

 may suggest such a reference, the venation of the wing, as repre- 

 sented, is more like that in Aniso7nera. Eoser's account (Wurt. 

 Zweyfls.) of the metamorphosis of this last, however, does not 

 agree with Degeer's of the insect in question ; and the express 

 character given of " hairy veins " scarcely leaves any alternative 

 but to suppose it meant for an Erioptera."' — Hal. 



A. Antennae shorter than the head. 1. Orphnephila. 



B. Antennae setaceous, shorter than the head. 2. DiXA. 



Genus I. ORPHNEPHILA. 



Orphnephila, Hal. Zool. Journ. v. no. xix (1831) ; Westw. ; Itoud. 

 Thaumalea, Uuthe ; Loew. Chenesia, Mcq. ; Meig. ; Zett. 



Corpus parvum, oblongum, glabriculum. Caput parvum. OcelH ro- 

 tundi. Proboscis brevis. Palpi 4-articulati, elongati ; articuli cy- 

 lindrici, primus brevissimus ; secundiis crassior, ovatus ; tertius et 

 quartus pauUo lougiores. Antennae filiforraes, breves, basi crassaj. 

 Thorax robustus, gibbus. Scutellum mediocre. Ala) nudae, parallels, 

 sat latfe, basi angustatae, apice rotundatae. Abdomen segmentis 

 7, subcylindricura, sat crassum, thoracc paullo angustius ct fere 

 duplo longius. Pedes subaequales, mediocres, simphces, nudi, incr- 

 mes ; coxae breves ; ungues et onychia parva ; Mas, oculi in frontc 

 connexi. Anus magnus, valvatus. 



Body oblong, rather small, nearly smooth. Eyes round, large, meet- 

 ing on the front, bat not on the under side. Proboscis short, with 

 oblong labella. Labrura still shorter, stout, conical ; the lateral edges 

 sinuatcd or toothed; the tongue concealed. Palpi more tliat twice as 

 long as the antennae, five-jointed ; first joint shortest ; second thickest, 

 ovate; the others gradually more slender; the fiith not elongated. 

 Anteniuie near the mouth, shorter tlian the head, seeming composed of 



