206 
[October 
in the uniform coloring of the costa, and in the very remarkable orna¬ 
mentation of the legs and especially the tibiae. In Jiavescens % the 
anterior tarsus is a trifle longer than the tibia; in cruentata % it is the 
same length. In Jlavescens 9 it is a trifle shorter, in cruentata 9 i 
shorter. In both species the first tarsal joint is slightly shorter than 
the second in S 9 hind legs, shorter in 9 anterior legs, and much 
shorter in S anterior legs, and corresponding differences are observable, 
in the other species of this genus, between the different % 9 legs, 
except in H. simplex where % 9 anterior tarsi are abnormally short. 
H. maculipennis, n. sp.— % Pale yellowish. Head with, the vertex ferrugi¬ 
nous; orbits of ocelli and antennal seta dusky. Thorax ferruginous above. 
Dorsum of abdomen with the terminal § of joint 6, the whole of 7 and 8 and the 
extreme base of 9, piceous ; anal appendages and setse whitish. Legs whitish, 
the femora yellowish and generally with a short fine fuscous vitta beneath at 
tip; all six tarsal claws and the extreme tips of the anterior tibiae, fuscous. 
Wings hyaline; veins fine and dusky, cross-veins coarse and black, except on the 
inner submargin of the front wing and the entire hind wing, where both veins 
and cross-veins are all hyaline. On the costa of the front wing the cross-veins 
are coal-black and arranged as follows, giving the appearance of spots:—at 
the base about four at the usual distance, the ist in both rows and the next 
three in the costal row heavily bordered with black, then an open space, then 
on the middle of the costa a group of about three cross-veins close together and 
bordered with black, then a space with fewer cross-veins than usual, then at f 
the distance to the tip another similar group of four or five similarly bordered, 
then cross veins at the usual distance as far as the tip. 
The 9 is paler than , and the terminal dorsal joints of the abdomen are 
whitish-opaque more or less tinged with ferruginous. The tip of the anterior 
tibiae is scarcely ever fuscous, and the costal markings are rather paler.— 
Length—6 mill. 9^—6 mill. Exp.14—17 mill. 91 ^—17 mill. Seta'^ 
12—15 mill. 9 9mill. Ant. leg % 8 mill. 9 (same size) 5 mill. 
Eight % , seven 9 . 
The subimago % 9 differs as usual. The setae are tinged with dusky 
at tip; the wings are tinged with dusky, and all the cross-veins are 
slightly bordered with dusky.—Length S 9 mill. Exp. S 14 mill. 9 
15i mill. Seta S 7^ mill. 9 8 mill. One % , one 9 .—A well marked spe¬ 
cies, remarkable for the arrangement of the costal cross-veins. In the 
anterior % leg, tarsal joint 1 is about i of 2, in anterior 9 leg joint 1 is 
about I of 2; in both % 9 anterior legs the tarsus is longer than the 
tibia; in the four hind legs % 9 joint 1 is the same length as 2, as in 
pulchella, terminafa and simplex. 
