PARKER: NKW KNdl.A.Nl) SAi{(()l'IIA( il DAE. ."i 
introduced by Mr. J. F. Martin in a paper as yet niipul)li.slicd. .Sincere 
thanks are due to Dr. (i. Bottclier of \Viesl)aden, (ierniany, for tlie 
identification of material and for advice and inforniation w liieli he has 
generously given; to Mr. C. W. Johnson for liis advice, continued 
interest, antl assistance in many ways; to Mr. Samuel Henshaw of the 
Museum of ( 'omparative Zoology at Harvard University for the use of 
literature and the privilege of examining material identified hy Mr. 
R. H. Meade; to Dr. F. E. Lutz of the .American Museum of Natural 
History for the privilege of examining the cotypes of Dr. Williston's 
St. \'incent species, and other nuiterial deposited there; to Dr. L. O. 
Howartl of the United States Bureau of Entomology for his kindness 
in securing nie access to the collection of the United States National 
Museum; to Professor J. M. Aldrich for a friendly interchange of 
ideas and interest shown in my work; and to Dr. J. Villeneuve of 
Rambouillet, France, for the identification of material. For the loan 
of material or for other reasons, expression of my obligation is due to 
Mr. ('. W. Johnson, Professor R. A. Uooley, Mr. -\. F. Burgess, Mr. 
F. L. Washburn, Dr. W. E. Britton, Dr. \V. E. Hinds, Mr. S. J. 
Hunter, and many others. 
External An.\tomy. 
The following description of the external anatomy and explanatory 
figures are of Rarinia communis, n. sp., the most common New England 
species of the family. Definitions of taxonomic regions and chaeto- 
taxic designations are intended to apply only to members of this group 
here treated and are not of general application. In the figures, mem- 
brane is represented by dotted areas, and internal structures and 
regions of no actual anatomical significance by a series of dashes. 
The term 'vestiture' as used in this paper designates the covering 
of any body division or region exclusive of ))ristles or macrochaetae 
that are of chaetotaxic value. 
Head. 
Viewed from in front, the head is broader than deep; from the 
side the front is seen protruding rather prominently, while that portion 
of the head which lies posterior to the eyes is only somewhat convex. 
The oral opening is on the ventral surface; from it the retractile 
proboscis extends do^jvnward and bears the .slightly club-shaped palpi 
(PI. 1, fig. 6). 
