PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 
SMITHSONIAN INSTITUTION 
U. S. NATIONAL MUSEUM 
Vol. 92 Washington: 1942 No. 3151] 
NEW NEOTROPICAL INSECTS OF THE APTERYGOTAN 
FAMILY JAPYGIDAE 
By H. E. Ewine and Irvine Fox 
Tue new species of Japygidae described in this paper represent 
those found while the writers were working up the exotic material 
in the collection of the United States National Museum. Most of 
this material was in good condition, and the descriptions here given 
were made almost exclusively from mounted specimens stained with 
acid fuchsin. In addition to the usual taxonomic treatment, notes 
have been added on the nature of food taken (victims eaten) by these 
predators, and in the case of one species a description is given of the 
musculature of the proximal part of the antenna. 
All the species here described have in common a type of antenna 
peculiar to certain genera. It is described as follows: Antenna long, 
extending backward over much of the thorax and composed of a 
large and individually varying number of segments; segment IV 
broadest, with each succeeding segment progressively reduced in di- 
ameter; setae of each segment of varying length. Also in each species 
the legs are progressively longer from the first to the last. However, 
leg II may be but very slightly longer than leg I, while leg III may 
be much longer than II. Like most tropical japygids, those here 
described are from moderate to large size. 
EVALLJAPYX DURICAUDA, new species 
PLATE 33, FIGURE 1 
Description.—Head with lateral margins almost straight for most 
_ of their length but strongly curved near base. Antenna consisting of 
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