DIPTERA, 3258 
CmiongEa, Dalm. 
C. aroneoides. The only species known; it is found in win- 
ter on snow and Ice *. 
A second subgenus might be formed with the Tipule atome of De 
Geer—Mem. Ins. VIII, 602, XLIV, 27—which is always apterous, 
but whose antenne have at least fifteen joints, whereas M. Dalman 
allows but ten to the preceding Insect. De Geer found this species 
running very rapidly across his table. They are both very small. 
Another division of our Tipulariz, that of the Mungivora, is distin- 
guished from the preceding ones by the presence of two or three 
ocelli. The antennz also are much longer than the head, slender, 
composed of fifteen or sixteen joinis, a circumstance which removes 
these Insects from the succeeding division.. The eyes are entire or 
emarginated. There is nodivision in the last joint of the palpi. The 
wings are always incumbent and horizontal on the body, and their 
nervures, longitudinal as well as transverse, are usually much less 
numerous than those of the preceding Tibularie. The legs are al- 
ways long and slender, and the extremities of the tibize spinous. 
In some the palpi are curved, and composed of at least four very 
apparent joints. The antenne are filiform or setaceous, 
Of these, some have the anterior extremity of the head prolonged 
into a rostrum or proboscis, and in those where this elytron is less 
considerable, the head is almost entirely occupied by the eyes. There 
are always three ccelli. ‘The antennz are short, and their joints but 
slightly elongated. 
Those species, in which the eyes occupy almost the whole of the 
head, where the ocelli are of equal size, and placed on a common emi- 
nence, and where the rostrum projects and is not longer than the 
head, form the subgenus 
Rypuus, Lat. 
Those, in which the eyes only occupy the sides of the head, where 
the ocelli are not situated on a common tubercle, and where the an- 
terior are smaller than the two posterior, and the rostrum is pro- 
longed under the pectus in the manner of a proboscis, compose the 
subgenus 
ASINDULUM f. 
The subgenus 
GNORISTA, Meig. . 
Only appears to differ from Asindulum in the insertion of the palpi, 
which, according to his figures, is near the extremity of the proboscis, 
and not near its base. This remark was communicated to-me by M. 
Carcel §. 
In no one of the following subgenera do we find the anterior part 
of the head projecting in the manner of a rostrum or proboscis. ‘he 
eyes are always lateral. 
Sometimes the antenne, in the males at least, are longer than the 
* Dalm., Anal. Entom., p. 35. 
+ Lat., Gener. Crust. et Insect., IV, 251; Meig. Dipt. I, 155. 
t Lat., Ibid., Meig., Ibid. 
§ Meig., Ibid. 
