LESTREMIA. 57 



Genus XI V_ ZYGONEURA. 



Zygoneura, Meig. Zw. vi. 30i (1830); Mcq. ; Zett. 



Coi-pus parvura. Caput parvum. Proboscis prominula. Labium bi- 

 lobuin. Oculi reniformes. Ocelli tres, medins minimus, antepodius. 

 Palpi triarticulati. AnteuncB \(S-articidut(e, moniliformes. Tliorax 

 subellipticus. Ala immaculata3, verue. cubilalis et subaualis simplices, 

 vena; subapicalis turcaj valdc arcuatre. Pedes non clongati; iihioi 

 spinis et calcaribus nullis. Mas. Antennce verticillato-pilosce, articuUs 

 petiolatis. Fcem. Antennas pubesceutes, articulis approximatis. 

 Body small, black. Head small. Proboscis somewhat prominent. 

 Labium bilobed. Eyes reniform. Ocelli three, the middle one in front, 

 vei'y small. Palpi three-jointed, curved downward. Antennee sixteen- 

 jointed, moniliform. Thorax nearly elliptical. Wings rather narrow, 

 unspotted ; costal vein ending at the tip of the wing ; subcostal vein 

 rudimentary ; radial vein not extending to one-third of the length of 

 the wing ; cubital simple, ending near the tip ; fo^'ks of the subapical 

 vein much curved, especially the fore one ; suhanal vein simple ; anal vein 

 much curved downward. Halteres rather long. Abdomen moderately 

 long. Let/s not long ; coxae rather large ; tibia: loith no spines nor spurs. 

 Male. AntenncB verticillute-pHose ; joints p)etiolated. Fern. Antenna? pu- 

 bescent ; joints sessile. 



This genus resembles Cecidomyia in the structure of its anten- 

 nas ; in other characters it is nearly allied to Sciara. 



1. sciarina, Wiuthem; Meig. Zw. vi. 305. 1 (1830) ; Mcq. ; Zett. 

 Nigra, nitens, alis su1)limpidis, venis nigricantibus, halteribus pedibusque 

 tcstaceis, tarsis nigricantibus. Long. 1 ; alar. 2 lin. 



BJack. Thorax shining. Wings nearly limpid ; veins blackish ; sub- 

 apical vein pale before its fork. Halteres and legs testaceous ; tarsi 

 blackish. 



Not common. (E. S.) 



Genus XV. LESTREMIA. 



Lestuemia, Mcq. D. N. (1825); Meig. Zw. vi. ; Loew ; Zett. Ti- 

 pula p., F. E. S. Chironomus p., F. S. A. Sciara p., Meig. Zw. i. 

 Diamesa, Meig. Zw. vi. in Tab. 



Corpus gracile. Oculi emarginati. Ocelli nulli. Palpi breves. A)i- 

 tenncB gracilcs, IQ-articulata. Thorax subellipticus. Alee pubes- 

 ceutes ; vena radialis brevis ; cubitalis et subaualis simplices ; subaj)i- 

 calis furcata. Abdomen oblauceolatum. Pedes gracilcs, longiusculi, 

 spinis calcuribusque nullis. Mas. Antennee nioniliformes, verticillalo- 

 pilosee, sat longai. Fom. Antenna) submoniliforraes, piloss, breves. 

 Body slender. Palpi short. Eyes emarginatc. Ocelli none. J). 



VOL. IV. I 



