﻿PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 



by the 



SMITHSONIAN INSTITUTION 



U. S. NATIONAL MUSEUM 

 Vol. 102 Washington: 1952 Nq^ 33O3 



A NEW SPECIES OF INSECT 0¥ THE ORDER PROTURA 



By Grace Glance 



The members of the order Protura, usually placed in the class 

 Insecta, are considered the most primitive members of the class. In 

 1938, Silvestri described the first South American proturan, Aceren- 

 tulus travassosi, of the family Acerentomidae, from Brazil. The new 

 species described in this paper seems to be the second proturan to be 

 described from South America. 



In 1948, Dr. F. Bonet, of the Escuela Nacional de Ciencias BioMgi- 

 cas, Mexico City, spent several months at the United States National 

 ^Museum studying the Protura collection. I wish to acknowledge 

 with much gratitude the help and suggestions he gave me in beginning 

 work on this order. 



I made the drawings for figiu-es 85 and 86 with camera lucida. They 

 were transferred and inked by Mrs, Aime M. Awl. 



FAMILY EOSENTOMIDAE 



EOSENTOMON VENEZUELENSE. new species 



Figures 85, 86 



The adults are dark yellow and well chitinized; the maturus junior 

 is much less chitinized and the thorax and abdomen I-IV are white. 

 An unexpanded female is 797iu long; the completely expanded male, 

 holotype, is 1,243/i long. The head (fig. 85, a), is 132-136^ long; at its 

 greatest width 89-100/1. In one female specimen, the head is sub- 

 spherical, 107/x long bj^ 96)u wide. The pseudoculi are oval, 9-1 2/i long. 



THORAX 



The first pair of legs is longest, the second pair shortest. Tarsus I 

 (fig. 85, e) is 98-107m long; claw 17-18. S^t long. From the dorsal, 



967607—52 3O5 



