538 Transactions of the Society. 



Genus Metalabis g. n. 



Eulabis Zacher (1911), p. 377 (partim.). 



Apterum ; abdomen paullo dilatatum ; forcipis bracchia $ 

 subremota ; metaparameres apice acuminati, 2\ longiores quam 

 latiores, margine externo bisinuato, interno convexo, apice ipso 

 recurvo. 



Apterous ; generally resembles Anisolabis, but forceps $ 

 subremote and feebly asymmetrical ; abdomen feebly dilated, 

 attaining maximum width at the eighth segment. Metaparameres 

 about two and a half times as long as broad, externally bisinuate, 

 internally concave ; strongly narrowed, acute apically, the tips 

 slightly recurved ; preputial sack with chitin-plates and two rows 

 of teeth. 



Type. — Eulabis saramaccensis Zacher. 



Range. — South America (northern portion). 



This genus is formed for E. saramaccensis, the only described 

 species. The metaparameres are figured by Zacher. They are 

 really of the same type as in Spandex, from the same countries ; 

 and this genus in fact only differs from Spandex in the entire 

 absence of the organs of flight. 



I possess this species from Dutch Guiana and Trinidad. In 

 one specimen, an old and dry one, I can detect the ejaculatory 

 duct at the entrance into the preputial sack, and on the other 

 side, a very faint remnant of the virga at the apex of the sack. 

 Very probably in fresh specimens the virga will be more easily 

 discernible. (PI. XI, fig. 7). 



Genus Apolabis g. n. 



Apterum ; abdomen modice dilatatum ; forcipis bracchia $ 

 subremota ; metaparameres modice longi, prope basin latiora, turn 

 attenuati, apice acuti, margine externo sinuato, interno saepius 

 recto, apice haud recurvi. 



Apterous ; abdomen moderately dilated ; branches of the 

 forceps $ remote or subremote ; metaparameres moderately long, 

 widest near the base, but not at the base itself, then narrowed, the 

 points acute, external margin sinuate, internal margin straight, the 

 tips not recurved. 



Type. — Apolabis hottcntotta Dohrn. 



This genus contains mostly Ethiopian forms, but I feel obliged 

 to range here the Asiatic A. marginalis. The virga is visible in 

 the West African A. isomorpha Bor., but not in the other species ; 

 the metaparameres in this species, too, are somewhat different, 



