1887] y : Zoology. eee 1031 
-the tribes and genera; and in the body of the work each generic 
description is followed by a table of the species when the genus 
contains more than one. : 
_ The second of these systematic works is “A Monograph of 
the Aphodiini inhabiting the United States,” by Dr. George H. 
Hom? In this monograph eighty-two species are enumerated. 
i Each species is fully described, and synoptic tables for separating 
4 are given. e work is done in the careful manner char- 
acteristic of Dr. Horn’s writings. It is based on practically a . 
Complete series of specimens. Only two of the species are un- 
known to Dr. Horn, and all but four are in his cabinet. The. 
descriptions are so definite that specimens can be determined 
fom them with certainty. | 
2 From the Department of Agriculture at Washington we have 
fectived the annual report for 1886, containing the report of 
Dr, Riley as entomologist; and from the same source we have 
"ceived Bulletins Nos. 13, 14, and 15 of the Division of Ento- 
logy. The more important of the topics discussed in these 
ports are the following: “The Cottony Cushion-Scale,” which 
"S doing great injury in California; “The Southern Buffalo- 
ii The Fall Web-Worm,” and “Insects Injurious to 
as just been issued a volume by Mr. Maskell on the “Scale 
Sects of New Zealand.” This is illustrated by twenty-three 
„YS consists of a nervous apparatus and a pigment-layer, 
i. latter, unlike the eyes of Lang’s Polyclada, consists of 
rRucleated cells united. The cavity of this pigment-layer 
a with end organs, each of which has a complicated EEA 
‘though this whole apparatus has previously been descri 
Si 
: * Trans. Am. Ent, Soc., vol. xiv. p. I-110. 
