1892.] Entomology. 969 
District of Columbia, in which 370 species are recorded, sixty-two of 
which are new and undescribed. The localities and dates are given. 
Mr. J. H. Emerton, in the last issue of Psyche, announces that his 
The New England Spiders is ready for distribution, the work consist- 
ing of papers published in seven parts in the Transactions of the Con- 
necticut Academy of Arts and Sciences, Vols. vi, vii, and viii. There 
are descriptions of 340 species and 1400 figures. 
Dr. Marx has also prepared’ a contribution to the study of the 
spider fauna of the Arctic Regions, compiling a list of 292 species 
which have so far been found and described from the Arctic regions 
of the globe. A large number of these are described in a manuscript 
paper by Dr. Marx that is not yet published. The author summarizes 
the results of a close study of the polar spider fauna of both hemis- 
pheres as follows : 
1. “The Arctic spider fauna is composed of the ten families which 
we may term the common ones, their species constituting the main 
bulk of the entire spider fauna of the world. They are cosmopoli- 
tans, and are found almost wherever animal life is possible. 
2. “The genera of the Arctic spider fauna are, without exception, 
those which also occur in other regions of the world, and there has 
been found so far not one genus which is original to that zone of eter- 
nal ice and snow. This is a very remarkable fact, since in all other 
Arthropod orders, and those of higher rank, the polar fauna is distin- 
guished by special and peculiar forms. 
3. “Even among this species a vast number occur which live in 
milder climates and under entirely different conditions and influences, 
and we find some families represented by only such forms, lacking 
entirely original Arctic species. 
4. “The differences between the faunas of the Eastern and Western 
Hemispheres are slight, and, generally speaking, those forms which 
are most frequently represented in one are also found in the larger 
proportion in the other.” 
The Encyrtine.—Mr. L.O. Howard publishes? an interesting 
synopsis of the Encyrtine with branched antenne. He includes six 
genera, three of which—Calocerinus, Tetracladia, Pentacnemus—are 
new. Three new species are also described. ‘The paper is illustrated 
by two excellent plates. 
Proc. Ent. Soc. Wash., ii, pp- 186-200. 
8Insects of the sub-family Encyrtine with branched antenna. Proc. U. S. Nat. 
Mus., No. 905. ` 
