273 TIPULTDiE. 



Genus 11. ANISOMERA. 



Anisomera, Hoffm. Meig. Zw. i. 210 (1818) j Mcq. ; Zett. Hexa- 

 toma, Latr. ; Lam. Fereiiocera, Curt. 



Corpus elongatum, mediocre, subla^ve. Caput rotundum, sessile ; frous 

 latissima. Oculi parvi, oblougi, reraoti. Proboscis brevis. Palpi 

 4-articulati, exserti, incurvi ; articuli fequales. Antennpe 6-articu- 

 lataj, porrectfe, subfiliformes ; articulus primus cylindricus ; secuudus 

 cyathiformis ; tertius et sequeiites setacei, subpubescentes, liic longus. 

 Prothorax brevissimus. Thorax sat convexus. Scutellum mediocre. 

 Metathorax brevis. Alpe incuuibentes, mediocriter latee. Abdo- 

 men elongatum, segmentis octo. Pedes lougiusculi, sat graciles, 

 iuermes, fere uudi ; coxaj breves ; tibiae jwsteriores calcaribus brevis- 

 simis. Mas. Antennse longiores. Abdomen apice obtusum, forcipe 

 brevi. Fceni. Auteunse breviores. Abdomen stylis analibus rectis 

 parvis. 



Body elongated, dull, nearly smooth, of moderate size. Head round, 

 sessile ; front very broad. Eyes small, oblong, remote. Proboscis 

 short. Palpi four-jointed, exserted, curved downward ; joints of ecpial 

 size. Antennfe six-jointed, porrect, subliliform ; first joint cylindrical ; 

 second cyathiform ; the followhig joints setaceous, minutely pubescent, 

 the third long. Thorax moderately convex. Prothorax very short. 

 Scutellum of middle size. Metathorax short. Wings incumbent, long, 

 lanceolate, rather narrow ; mediastinal vein ending at a little before or 

 beyond two-thirds of the length of the wing. Subcostal ending at four- 

 fifths or five-sixths of the length, connected with the radial by a trans- 

 verse veinlet from the angle close to its tip ; radial and cubital spring- 

 ing from a commcJii petiole, which nearly or quite equals them in length, 

 and proceeds from the subcostal at more or less before half the length 

 of the wing, and forms an angle close to its base ; cubital connected at 

 one-fourth of its length with the externo-medial by a transverse veinlet, 

 the middle of which emits another externo-medial, and in a line with it 

 there is a veinlet between the externo-medial and the snbanal, where the 

 latter forms an angle to the hind border ; anal and axillary complete ; 

 no discal ai'colet. Halteres of moderate length. Abdomen elongated, 

 with eight segments. Legs moderately long and slender, nearly bare, 

 unarmed ; coxte short ; posterior tibiae with very short spurs. Male. 

 Antennae longer. Abdomen obtuse at the tip, with a short forceps. 

 Fern. Antenna; shorter. Abdomen with straight short anal styles. 

 Inhabits the banks of river?. The larva lives in mud, 



a. Antennse of the male as long as the body ; of the fenudc half the 



length of the thorax. Species 1. 

 a a. Antenna; of the male hardly more than half the length of the thorax; 



of the female less than half the length of the thorax. Species 2. 



1. nigra, Latr. Gen. Curt. iv. 2G0 (1809); Lam.; Mcq. Nigra, 



