LIBRARY

TRICHOPTERA
7. Principal fork of the median vein in the fore wings without a closed
cell. . ..... 8
Principal fork of the median vein in the fore wings with a closed cell
CALAM0 CERA.TIDlE
8. Closed cell in the first fork of the radial sector of the fore wings. 9
No closed cell in the first fork of the radial sector. . MOLANNIDlE
9. Both branches of the radial sector forked . . • 10
Only the anterior branch of the radial sector forked LEPTOCERIDlE
10. Veins R\ and R2 in the fore wings confluent apically or connected by an
apical cross vein . . . ODONTOCERIDlE
Veins Rl and R2 in the fore wings not connected apically
SERICOSTOMATIDlE
11. Ocelli present . . PHILOPOTAMIDE L
Ocelli absent 12
12. Front tibire with three spurs . POLYCENTROPIDJE
Front tibire with less than three spurs . . . 13
13. Anterior branch of radial sector in fore wings forked HYDROPSYCHIDlE
Anterior branch of radial sector in fore wings not forked PSYCHOMYUDlE
14. Maxillary palpi with four joints . . PHRYGANEIDJE
Maxillary palpi with two or three joints 15
15. Maxillary palpi filiform and smooth; fore tibire with a single spur.
LIMNEPHILIDJE
Maxillary palpi hairy or scaly; fore tibire with two spurs.
SERICOSTOMATIDJE
LARVlE 2
1. Anal prolegs not fused in median line to form an apparent tenth abdominal
segment. 2
Anal prolegs fused in median line to form an apparent tenth abdominal
segment . 7
2. Abdomen much wider than thorax . . HYDROPTILIDlE
Abdomen little wider than thorax 3
3. Dorsum of ninth abdominal segment with a chitinous shield
RHYACOP1ULIDlE
Dorsum of ninth abdominal segment witl10ut a chitinous shield. 4
4. Trache