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. 
Tipui.ari.Tl.. Lalreille. 
Antenna: with many joints, filiform or setaceous, longer than the head- 
Stirps 1. — Ocelli none : antenna very hairy : eyes large: rostrum tubu- 
lar and long. 
Genus 489. CUT.F.X of authors. 
Sp. 1. Cul. pipiens of authors (the common gnat). (PL 9. fig. 5.) 
Inhabits water in the larva state. 
Stirps 2. — Ocelli none : antenna very hairy : eyes large: rostrum very 
short, terminated by two lips : two anterior legs at a distance from 
the others. 
Genus 490. CORETFfiRA. Meig., Illig., Ldtr., Leach. 
Antenna fourt.een-joiuted ; the basilar joints conic-ovoid ; of the mate 
with fasciculi of hairs; with simple hairs on the females, the two 
last joints attenuated, elongated. 
Sp. 1. Cor. cucuLformts. Meig. 
Inhabits marshy places. 
Genus 491. TANYPUS. Meig., Illig., Latr., Leach. 
Antenna fourteen-jointed, very plumose, moniliform, their extremith’ 5 
filiform ; of the male, almost entirely moniliform, their last join 1 
larger and ovoid in the female. 
Sp. 1. 'Tan. cinctus. 
Inhabits marshy places. 
Genus 492. CIIIRONOMUS. Meig., Lair., Illig., p a br., Leach- 
Antenna twelve-jointed, very plumose, moniliform, with filiform eX' 
tremities in the male, seven-jointed, the last joint elongate, cylindrte 
in the female. 
Sp. 1. Chir. plumosus. Meig. 
Inhabits marshy places. 
Stirps 3. — Otelli none: antenna very hairy : eyes large: rostrum 4 , e r - v 
short : legs at an equal distance from each other. 
Genus 493. PSYCIIODA. Lair., Fabr., Leach. Tinearia. Sche IL 
Tuichoptera. Meig. 
Wings deflexed : rostrum shorter than the head . antenna with u 
or sixteen j oiu ts, of a globular form, covered with bundles of ha 11 " 
