ISCHNURA 345 
The Known Nymphs 
Setae Gills 
Species Length * |__| Extt| Comb t | Pigmentation Described by 
Lat. | Ment 
barberi 15+5.5 5 4 5-7 4% Tracheae only | Byers '27, p. 000 
cervula 12+6 5 4-5 4-5 4% Uniform Kndy. ’15, p. 309 
denticollis 10+5.5 5 4 (0)?} % Uniform Kndy. ’17, p. 505 
perparva 11+5 5 3-5 5 4+ Uniform Ndm. & Ckll. ’03, p. 139 
posita 11+5.5 5 4 4 \ 4 x-bands & Ndm. & Ckll. ’03, 
apex p. 260§ 
verticalis 14+6.5 6 4-5 6-7 4% Variable Ndm. ’03, p. 260§ 
* Body +gills. 
+ Spines on outer margin of mentum of labium. 
t Spinous margin on base of dorsal edge of middle gill in terms of length of entire gill. 
§ Also by Garman ’17, and Howe ’21. 
KEY TO THE SPECIES 
Adults 
1. Males 
1 Anterior surface of the thorax. Solid black, no antehumeral 
stripes. Penis without a pair of erect spines on the penultimate 
Segment: (CHLANURA, IKKGNREdY) 00) oc ece e tc shuns on eee 2. 
Anterior surface of the thorax not solid black. Penis with a pair 
of erect spines on the penultimate segment................ 3. 
2 Inferior appendages viewed in profile two branched, the inferior 
branch a rounded tubercle, the superior branch short, turned 
up, and covering the inferior branch of the superior appendage 
Beet Ne ea etc Navslal ot voataenn s Comoe gemina, p. 349 
Inferior appendages viewed in profile two branched, the inferior 
branch sharp and pointed, the superior branch short and not 
turned up, and not covering the inferior branch of the superior 
SPPEN CAGES ei Ae i ks ae ee ak denticollis, p. 348 
3 Apical fork on segment 10 elongated into a spine. The paired 
spines of the penis external. (ANOMALURA, Kennedy).......... 
2 AR ait aN a WGI crclgeceetd AE Gs wil Seay Sa prognatha, p. 349 
Apical fork on segment 10 not elongated into a spine. Paired spines 
Ol Phe semis ICEMAN i 24). cick tasty ee Ateay sooo Ol oe 4. 
4 Antehumeral green strip present (a superior spot and a smaller 
inferior one, appearing as an exclamation mark in posita) . 
Antehumeral green stripe indicated by a pair of widely separated 
ABCULAP BOOUS ¢ sisiscs-a2scer) lolan tare Rake Way aa a er ee 14. 
