548 
The Ohio Naturalist. 
[Vol. VI, No. 8, 
LL: Fourth abdominal segment 
4-0 times as long as third. 
M: Fourth abdominal seg- 
ment, 5 times as 
long as third. 6 
ocelli on either side 
Gen: 15(26) 
Trichocorypha. 
MM: Fourth abdominalseg- 
ment 4 times as 
long as third. 
N : 8 Ocelli on either 
side. 
Gen: 16(27) 
Seira. 
N N : 4 Ocelli on either 
side. 
Gen: 17(28) 
Paronella. 
II: Pronotum extending over head and par- 
tially concealing it. 
J: 8 Ocelli on either side. 
Gen: 18 (29) Lepidocyrtus. 
JJ : 6 Ocelli on either side. 
Gen: 19 (30) Calistella. 
FF: Antennae of 5 segments. 
G: Eye-spot with 1 ocellus, terminal segment of anten- 
nae annulate. 
Gen: 20 (31) Templetonia. 
GG: Eye-spot with 8 ocelli, terminal segment of antennae 
simple. Gen: 21(32 Strongylonotus. 
CC: Saltatorial appandege attached to antipenultimate abdominal segment. 
Fam: 7. PODURIDAE. 
D: Mouth-parts extending cone-like from front of head. 
Gen: 1 (33) Gnathocephalus. 
DD: Mouth-parts not appearing cone-like from front of head. 
E: Antennae of 5 segments. Gen: 2 (34) Deuterolubbockia. 
EE: Antennae of 4 segments. 
Tarsus with 2 claws. 
G: Abdomen without terminal spur. 
Gen: 3 (35) Achorutes. 
GG: Abdomen with terminal spurs. 
H ; Abdomen with 2 terminal spurs. 
Gen: 4 (36) Schoturus. 
- HH: Abdomen with 4 terminal spurs. 
Gen: 5 (37) Tetracanthella. 
FF: Tarsus with 1 claw. 
G: Ocelli, 14-15 on either side. 
Gen: 6 (38) Podurhippus. 
GG: Less than 14-15 ocelli on either side. 
H: Terminal spur absent. 
I: Saltatorial organ long, curved, extending 
from posterior end of body. 
Gen: 7 (39) Podura. 
II; Saltatorial organ short, simple, not reach- 
ing the posterior end of body. 
J : Legs long, distinctly visible from 
above. 
Gen : 8 (40) Pseudachorutes. 
