90 THE ENTOMOLOGIST. 
10. Wuirr, G. F.: “ The Relation of the Etiology (Cause) of 
Bee Diseases to the Treatment,’ Bull. U. S. Ent. 75, 
pp. 31-42 (December 26th, 1908). 
11. Avrivinius, C.: ‘“ Hymenoptera I. Gaddsteklar. Aculeta. 
Sjunde Familjen. Vagsteklar. Pompilide,’’ Ent. Tidskr. 
xxvili. 1-30, figs. 87-110 (April 25th, 1907). 
12. Lampa, §.: “Om Oxstynget (Hypoderma bovis, DG.),” 
op. ctt. 65-72, pl. i. text figs. 1-2 (September 28th, 1907). 
(Diptera. ] 
13. Wauucren, E.: ‘Svenska Siphonaptera,” op. cit. 85-91, 
figs. 1-2 (September 28th). 
14. Ip.: ‘Diptera I. Forsta Underordnungen. Orthorapha. 
Andra Gruppen Fulgor. Brachycera. Fam. 14-23,” op. cit. 
129-91, figs. 1-25 (September 28th). 
There is nothing, apparently, entomological in the “ Bio- 
logical Investigation of the Athabaska-Mackenzie Region,” but 
the work will be indispensable to any entomologist studying the 
region, whose physical geography, life-zones, vertebrata, botany, 
and history are exhaustively considered (7), a bibliography 
and index being added. It is supplementary to the previous 
report on the Hudson Bay Region (1902, North American Fauna, 
no. 22). 
The Twenty-third New York Report is the buikiest of the 
series, and contains much matter of interest and importance to 
the systematist as well as to the biologist (5). The principal 
paper is Needham’s ‘‘ Report on the Aquatic Work done during 
1905” (pp. 156-248, text figs. 2-16, pls. 4-82, and 2 text maps), 
containing a new classification of the Tipulide; there are also 
extensive notes on the Odonata. Among the other contributions 
are Chadwick’s ‘‘ Catalogue of the Phytoptid Galls of North 
America’ (pp. 118-55) ; O. S. Thomson’s ‘“‘ Discussion of the 
Male Genitalia in Odonata” (pp. 249-63, text figs. 17-28) ; and 
Felt’s ‘‘ Further Work on the Cecidomyiide” (pp. 286-422, text 
figs. 29-49, pls. 83-44). 
Reuter has treated in the fullest manner the Palearctic 
Hemiptera of the Conifere (1). The enumeration and dis- 
cussion of the species are accompanied by a very extensive 
bibliography. Guilbeau (4) has discussed the origin of froth in 
Cercopid nymphs. He says that the secretion is made up from 
two sources. The fluid portion is the anal secretion into which 
the insect by means of the caudal appendages introduces nume- 
rous air-bubbles; the glands of Batelli secrete a mucilaginous 
substance, which, added to the former, renders it viscous, and 
causes the retention of the air-bubbles. Distant (2) has com- 
pleted his preliminary account of the Indo-Ceylonese Hemiptera. 
The work will be useful for the two hundred and eighty-two 
figures, many of the genera being figured for the first time. 
Gillette and Taylor (3) discuss at some length some orchard 
