530 PROCEEDINGS OF THE ACADEMY OF [Oct., 
the antennae; however, this fusion-segment is merely elongated and 
does not show the elongate-conical shape of the segment in Crypteria 
and the even more accentuated condition of Chionea. Specimens of 
Chionea valga Harris before me show eight flagellar segments beyond 
the fusion-segment, the basal ones short, becoming more and more 
attenuated toward the tip of the organ. Therefore, in the reduction 
of the antennal segments by the fusion of the basal flagellar segments, 
Chionea also shows a very close relationship to Crypteria and Ptero- 
chionea. I certainly think that Bergroth is right in surmising a 
relationship between his Crypteria and the abnormal, wingless 
Chionea, and Pterochionea may now be added to the list of possible 
C/iionea-precursors. This interpretation would remove Chionea 
from the neighborhood of Trimicra and Symplecta and place it at the 
end of the Eriopterine series along with Cladura and the present 
genus. 
The two winged genera of this group may be separated as follows: 
1. Antennae with the second segment enlarged, globular; the two 
apical segments of the flagellum entirely distinct; cross-vein 
r absent; second anal vein very elongate, extending beyond 
midlength of the radial sector; hypopygium with the pleural 
pieces slender with two small, subequal appendages. (North- 
western Palffiarctic.) Crypteria Bergroth. 
Antennae with the second segment not enlarged; the two apical 
segments of the flagellum fused; cross-vein r present; second 
anal vein short, not reaching to the base of the sector; hypopy- 
gium with the pleural pieces stout-cylindrical mth a strong, 
powerful dorsal appendage that is almost as long as the 
pleurite. (Northwestern Nearctic.) Pterochionea gen. n. 
Pterochionea bradleyi sp. n. 
Antennae brown, of eleven segments; wings with cell il/i present; 
male hypopygium strong and powerful. 
Male.— -Length, 5 mm.; wing, 5.6 mm. Fore leg, femur, 3.6 mm.; 
tibia, 3.8 mm.; hind leg, femur, 4.1 mm.; tibia, 4 mm. 
The species is described from alcoholic material. 
Rostrum short, light browm; palpi brown. Antenna dark brown; 
Head yellowish brown. 
Thoracic dorsum dull yellow with indistinct darker stripes on the 
praescutum. Pleura yellowish. Halteres pale. Legs with the coxae 
and trochanters pale yellow; femora light brownish yellow, a little 
darkened apically, the fore femora darker, being only a little paler 
at the base; tibiae and tarsi brown. Wings nearly hyaline, the 
stigma indistinct; veins dark brown, subcosta pale. Venation (Plate 
