DIPTERA. 



G]<J 



a perpendicular or incurved beak ; the palpi are curvea under, or recurved, but in the latter case they 

 have not more than two joints. Linnaeus united them in his genus 



Tipula (Tipularice, Latr.), 

 Which we divide in the following manner: — 



A first section is composed of species with antennae longer than the head, at least in the males, 

 slender, filiform, or setaceous, more than 12-jointed in the majority, and with long and slender feet. 



Some, having always wings, are destitute of ocelli, the palpi always short, the head scarcely 

 prolonged in front, the wings horizontal or roof-like, with but few nerves; the eyes crescent-like, and 

 the tibiae not spined. These are small species which reside, in the early states, either in water or in 

 the galls of vegetables. 



The Tipulides Cidiciformcs resemble Gnats, having the antennas entirely pilose, but with the hairs 

 much longer in the males than in the females. Their larvae live in the water, and resemble those of 

 Gnats. Some of them have false feet ; others have arm-like appendages at the posterior extremity of 

 the body ; they are generally of a red colour. The pupa: are also aquatic, and respire by two outer 

 appendages placed at the anterior extremity of the body. Some have the power of swimming. 



Corethra, Meg., has the antenna composed of fourteen oval joints, the terminal ones scarcely differing from the 

 preceding, and the wings horizontal. T. culiciformis, Ue Geer [the Straw-coloured Midge]. 



Chironomut, Meig., has the wings inclined, the antenna' 

 13-jointed in the males, and 6 jointed in the females, with short 

 hairs, the last joint, as in the males, being very long. T.aintuluta, 

 De Geer, [a very numerous genus of Midges], 



Tanyput, Meig. has the wings also deflexed, but the antenna; 

 arc 14-joint.d in both sexes; the penultimate joint very Long in 

 the males; the rest, as also all the joints of the female sntenne, 

 nearly globular ; the larva- have four false feet,— two near the 

 head, ami two at the extremity of the body. 



The Tipules Gallicolea have the antennae composed in 



both sexes of at least thirteen joints, furnished in the 



majority with short bans ; at the most with a pencil of 



hairs at the base in some males. 



("rnilopogon, Meig. {Citlicohlcs, Latr.),\msabund\e of hairs at the base in the males; the proboscis, as in 



the two following subgenera, has the form of a pointed beak ; the wings are incumbent on the body, and their 



larva- live in vegetable galls, 



Psyehod a, Latr., has no brush or hairs to the antenna? ; the wings are roofed, and have a irreat number of 

 nerves ; one species has two appendages at the 6ide of the thorax, which appear to be formed by the lateral extre- 

 mities of its front segment. 



Cecidomyia, Meig., has the antenna-, as in P-yhoda, moniliform, and furnished with verticillated hairs; the 

 wings horizontal on the body, with only three nerves. 



Lertremia, Macquart, has the antenna- formed of 



lobular, pedunculated joints in the males, the 



legs long and slender, and the basal joinl i I 



tarsi long. C. destructor, Say, appears to belong 



to tins subgenus, 



Maeropaa, Meg., is also closely allied to these 



I! M ' 



The Tipuks Terricoles comprise the Ian 

 Bpeciea in the family, with the antenna- loi 



1 leitrnctor, Mid C. Tritld, with Ibe larv»a of the latter t i,,..,u|..,„,| nil .i .],,„i.. r . ,i,.,,;,,,, . „r _„_n: . 



tnantni i,< aa,ana bk d celh; 



the eyes round and entire; the wings, extended in many, have always membranous nerves, nnited 

 I ther transversely, and closed discoidal cells. The front of the head is narrowed, and prolong 

 into a muzzle, with a basal prominence; the palpi generally long, and the extremity of t 

 Bpinose. 



The larvae of many species live in the earth, the rotten parts of tp es, &c. The thorai is not distinct, 



and they have no false feet. They exhibit at the superior extremity of the bodj two more evident 



apertures for respiration. The pupa- are naked, with two respirator] tubes near the head; and the 



s of the abdominal segments spinoae. These insects are well known under the name of Daddy 



Long te w, Tailors, &c. 



r'ijf. l.'IS. — Chironomus, with its Pupa and Larva, magnified. 



