290 MODERN SYSTEM. 



the wings : head distinct from the thorax by an evident interval : 

 proboscis (rarely wanting) univalve : tarsi with two simple nails. 



Besides these characters may be noted some others, which are 

 common to almost all dipterous insects. The mouth is for the most 

 part furnished with a rostrum having no articulations. Thorax com- 

 posed of but one segment, always distinct from the abdomen. 



Fam. I. TipuLiD.'E. Leach. 

 TiPULARi.E. LatreilJe. 

 Antennae W\t\i many joints, filiform or setaceous, longer than the head. 



Stirps 1. — Ocelli none: untcitnte very hairy: eyes large; 7-os^r?«H tubu- 

 lar and long. 



Genus 489. CULEX (f authors. 

 Sp. 1. Cut. pijiiens of authors (the common gnat). {PL 9.fg. 5.) 

 Inhabits water in the larva state. 

 Stiups 2. — Ocelli none: antcnyia very hniry : n/es large : rostnan very 



short, terminated by two lips: tico anterior legs at a distance from 



the others. 



Genus 490. COR£TIIRA. Meig., Jllig., Latr., Leach. 

 Antennce fourtcen-Jointed ; the basilar joints conic-ovoid ; of the male 

 with fasciculi of hairs; with simple hairs on the females, the two 

 last joints attenuated, elongated. 

 Sp. 1. Cor.cuculiforniis. Meig. 

 Inhabits marshy places. 



Genus 491." TANYPUS. Meig., Illig., Latr., Leach. 

 Antenntv fourteen-jointed, very plumose, moniliform, their extremities 

 tiliform ; of the male, almost entirely moniliform, their last joint 

 larger and ovoid in the female. 

 Sp. 1. Tan. cinctus. 

 Inhabits marshy places. 



Genus 49Q. CHIRONOMUS. Meig., Latr., Illig., Fabr., Leach. 

 Antennce twelve-jointed, very plumose, moniUforni, with filiform ex- 

 tremities in the male, seven-jointed, the last joint elongate, cylindrie 

 in the female. 

 Sp. 1. Chir. plumosus. Meig. 

 Inhabits marshy places. 



Stirps 3. — Oct//j none : f/?2/eH??(e very hairy : f ye.'? large: rostrum very 

 short : legs at an equal distance from each other. 



Genus 493. PSYCHODA. Latr., Fabr., Leach. Tineaeia. Schetl. 

 Trichoptera. Meig. 

 Wings deflexcd : rostrum shorter than the head . antenna, with fifteen 

 or i>ixteeii joints, of a globular form, covered with bundles of hair?. 



