LE9TREMIA. 57 



Genus XIV. ZYGONEURA. 

 ZYGONEURA, Meig. Zw. vi. 304 (1830); Mcq. ; Zett. 



Corpus parvum. Caput parvum. Proboscis prominula. Labium bi- 

 lobum. Oculi reniformes. Ocelli tres, medius minimus, antepositus. 

 Palpi triarticulati. Antennas IQ-articulatte, moniliformes. Thorax 

 subellipticus. Alee immaculatas, venae cubitalis et subanalis simplices, 

 vena3 subapicalis furcaB valde arcuatas. Pedes noil elongati; tibia 

 spinis et calcaribus nullis. Mas. Antennae verticillato-pilosce, articulis 

 petiolatis. Foem. Antennae pubescentes, articulis approximatis. 

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

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

 'very small. Palpi three-jointed, curved downward. Antenna 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 ; forks of the subapical 

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

 much curved downward. Halteres rather long. Abdomen moderately 

 long. Legs not long ; coxa3 rather large ; tibia with no spines nor spurs. 

 Male. Antennae verticillate-pilose ; joints petiolated. Fern. Antennas pu- 

 bescent ; joints sessile. 



This genus resembles Cecidomyia in the structure of its anten- 

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



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

 Nigra, nitens, alis sublimpidis, venis nigricantibus, halteribus pedibusque 

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



Black. 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. 



LESTREMIA, 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. An- 

 tennae graciles, \-articulatce. Thorax subellipticus. Aloe pubes- 

 centes ; vena radialis brevis ; cubitalis et subanalis simplices ; subapi- 

 calis furcata. Abdomen oblanceolatum. Pedes graciles, longiusculi, 

 spinis calcarib usque nullis. Mas. Antenna: moniliformes, verticillato- 

 pilosce, sat longse. Foem. Antenna3 submoniliformcs, pilosae, breves. 

 Body slender. Palpi short. Eyes eniarginate. Ocelli none. An- 



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