384 M. F. Meinert on Mochlonyx (Tipula) 
the basal joint of the forceps especially being very stout. The 
styles, on the contrary, are slender and slightly cochleariform, 
and bear at the apex, besides the very small and fine tactile 
sete, a small cultriform spine. Opposed to the styles are a 
pair of short but strongly chitinized hooks, which are inserted 
into the body as broad, somewhat dilated, posteriorly rounded 
chitinous plates, with the posterior margin deeply emarginate. 
The external genitalia of the female are short and stout. 
The legs are long, thin, densely hairy, and the first joint of 
the tarsi (metatars?) is several times shorter than the second. 
The proportion between these two joints in the male is for the 
first pair of legs as 1 : 6, for the second pair as 1: 5, and for 
the third pair as 1:4. In the female, on the other hand, the 
proportion for all three pairs of legs isas 1:5*. Thesecond 
tarsal joint is always the longest of all; in the male on all the 
tarsi a little more than twice as long as the third; in the 
female on the first two pairs of legs not quite twice the length, 
but on the third pair rather more than twice as long. ‘The 
last joint, or the claw-joint, is simple in the female, but in the 
male it is inflated at the base, where it bears a quantity of 
large incurved sete. The claws are long and slender; in the 
male they are relatively longer and thinner; from the middle 
of their immer margin starts a large, thin, slightly bent tooth, 
and from their basal part a short, pretty straight, crenulated 
process; in the female the claws are simple, but the basal 
processes are comparatively longer and more strongly denti- 
culated. The onychiwm consists of a long seta, which is 
somewhat thickened at its basal extremity, but produced in 
front into a very long, thin, somewhat bent or twisted thread, 
which bifurcates at the end, but before this emits from its 
sides rows of teeth as fine as hairs. 
The wings are long and narrow, and the nervures are closely 
beset with short setes arranged in pairs along them; the 
transverse nervures, however, are naked. The fringe of the 
wings consists of a double row of sete or lance-shaped spines, 
of which the upper series, or those which are attached to the 
upper surface of the wing, are, at any rate on the posterior 
margin, about half as long again as the sete in the series 
which is attached to the lower surface of the wing. It is in 
the posterior margin of the wing that these sete attain their 
highest development and most strongly marked lanceolate 
* Ruthe gives the proportion in Mochlonyx (Corethra) velutina for the 
fore legs as barely 1: 4 :—“ das erste Glied aller Fiisse viel ktirzer als das 
zweyte und dritte, an den vorderen Fiissen verhaltnissmassig noch kiirzer 
und nicht den vierten Theil des zweyten erreichend,” 
