320 INSECTA. 
ointed rostrum, The wingsare incumbent. The larve live in ve- 
getable galls *. 
Psycuopa, Lat., Meigq., 
Without any tuft or bundie of hairs on the antenne; wings tecti- 
form and furnished with numerous nervures. 
The front of the thorax, in one species of this subgenus, has 
two appendages which appear to us to be formed by the lateral 
extremities of its first segment f. 
Crcipomyia, Meigq., 
Where the antenne, like those of the Psychode, are granose and 
simply furnished with short, verticillated hairs, but where the wings 
are incumbent on the body, and present but three nervures f. 
Other species, still of the same division with those in which the 
antenne are slender, and manifestly longer than the head, are aiso 
destitute of ocelli; but the eyes are entire, and oval or round. The 
wings, distant in several, always present membranous nervures 
united transversely, at least in part, and closed, discoidal cells. The 
anterior extremity of the head is narrowed and prolonged in the 
manner of a rostrum, and frequently exhibits a pointed projection 
underneath. The palpi are usually long. The extremity of the 
tibize is spinous. 
Several of the larvze live in mould, decomposed trees, &c., and 
have no distinct thorax, nor false feet, but present two more appa- 
rent openings for respiration at the superior extremity of the body. 
The nymphs are naked, with two respiratory tubes near the head; 
the margin of the abdominal annuli is spinous. 
This subdivision comprises the largest species of Tipule, those 
called coutwriéres, taitleurs, &c., or our Tipulatres terricoles. 
In several the wings are always extended, the antenne of the 
males are usually bearded, pectinated or serrated; the palpi are 
composed of five joints, the last of which, extremely long, seems to 
consist of several smaller ones, or to be knotted. Such are the fol- 
lowing subgenera. 
Crenopuora, Meiq., 
Where the antenne are filiform, pectinated in the males, granose 
or serrated in the females. 
C. pectinicornis ; Tipula pectinicornis, Fab. The abdomen 
fulveus, with black spots on the back, and yellow streaks on 
the sides; wings marked with a black spot §. 
* Lat., and Meig., and the Monograph of M. Fallen. 
+ Lat., and Meig., Ibid. 
+ Meig., Dipt., I, 93. See also the Jour. Ac. Nat. Se. of Philad., Oct. 1817. 
M. Macquart—Dipt. du nord de Ja France—places his new genus LesTREMIA di- 
rectly after Cecidomyia. The antenne are hairy, curved forwards, not quite so long 
as the body, and composed of fifteen globular joints, pediculated in the males. The 
legs are long and slender, and the first joint of thetarsiis elongated. The Cecidomyia 
destructor, described and figured in the above journal, may, very probably, belong to 
this new subgenus, as the antennz seem to indicate. The Macropeze are also closely 
allied to these Diptera. 
§ Lat., Gen. Crust. et Insect., IV, 254; Meig., Dipt., 1, 155, 
