236 INSECTA. 
Macropgza, Meig. 
The Macropezz are distinguished by the extraordinary length of 
their posterior legs. Their antennz, to a little more than half their 
length, are densely pilose(1). 
Drxa, Meig. 
The Dixz are apparently closely allied to the Trichocerz, but 
the first joint of their antennz is very short, the second is almost glo- 
bular, and the following ones are proportionally more slender. The 
last joint of the palpi is also more elongated than in Trichocera(2). 
There the antenne have but ten or six joints. 
Those, in which they consist of ten, form the genus 
Mzxisrocera, Wied. 
Where the wings are distant(S). . 
Those in which they are composed of six form the 
Hexatoma, Lat. 
Which will comprise the Anisomere and Nematocerze of Meigen, 
which only differ from the Hexatomz by the third joint of the an- 
tenne being there longer than the second: in this respect it differs 
but slightly from the others(4). 
Other Tipulariz, analogous to the preceding ones in the absence 
of ocelli and the rounded figure of their eyes, exhibit a rare anomaly 
in this order of Insects: they are destitute of wings, and hence the 
origin of the term Aptera, which we apply to this subdivision. The 
antenne are filiform, but somewhat more slender towards the extre- 
mity, and but slightly pilose. The legs are long, and the tibie un- 
armed. The abdomen of tl.e females terminates in a point formed 
by a bivalve ovipositor. 
This subdivision comprises the genus 
(1) Idem. 
(2) Meig., Ibid., and Macq., Dipt. du nord a la France. 
(3) Dipt. Exot., p. 41. 
(4) Lat., Gen. Crust. et Insect., IV, 260; Meig., Ibid. 
