40 Psyche [April 
ARTHROPODS IN BURMESE AMBER. 
By 1: D. A. CockEREnL,; 
University of Colorado, Boulder, Colorado. 
A study of a considerable quantity of Burmese amber, additional 
to that previously reported on, reveals a remarkably interesting 
fauna. Hymenoptera are represented by Bethylidze, which are 
abundant, though often fragmentary; Evantide of several genera, 
and a Trigonalys. A very thorough examination fails to reveal a 
single ant. Hemiptera (Heteroptera) are represented by two 
genera and four species of Enicocephalide. There are some 
Homoptera, not yet closely examined. The Diptera include 
Empidide, Sciara, Psychodide (Trichomyia), and a Cecidomyiid. 
The Coleoptera include Elateridze, Dermestide, Rhipiphoride, 
Ipidee, and others not yet studied; but no Carabide or Pausside. 
There are many Blattids, young or fragmentary in every case; 
Termites are also frequent, but probably of few species. The 
mites are numerous and varied, but usually in poor condition for 
description; no spiders have yet been found. The Diplopods are 
represented by Polyxenus, and there is a good Pseudoscorpion, 
representing an apparently extinct genus. There is a very good 
Lepismatid, referred rather doubtfully to Lampropholis. The pres- 
ent paper puts on record a number of these discoveries. ‘The amber 
(Burmite) was found in clay of Miocene age, but was derived 
from elsewhere, and may be much older. ‘The specimens have been 
presented by Mr. R. C. J. Swinhoe of Mandalay to the British 
Museum. All the species described below were in a single large 
lump of amber, and therefore lived at the same time and place. 
PSELAPHOGNATHA. 
Polyxenus burmiticus sp. nov. (Polyxenide). 
Length about 2400 microns; antennze about 320; width of head 
about 560; longest lateral bristles about 560 microns long, longest 
caudal bristles about 720. Apparently sixteen pairs of legs. An- 
tenn apparently 7-jointed, counting a very minute and rather 
doubtful apical joint; fifth joint longest; first, second, fourth and 
