90 THE ENTOMOLOGIST. 



10. White, 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. AuRiviLius, C. : " Hymenoptera I. Gaddsteklar. Aculeta. 



Sjunde Familjen. Viigsteklar. Pompilidae," Ent. Tidskr. 

 xxviii. 1-30, figs. 87-110 (April 25th, 1907). 



12. Lampa, S. : " Om Oxstynget {Hypoderma bovis, DG.)," 



ojj.cit. 65-72, pi. i. text figs. 1-2' (September 28th, 1907). 

 [Diptera.] 



13. Wahlgbbn, E. : " Svenska Siphonaptera," op. cit. 85-91, 



figs. 1-2 (September 28th). 



14. Id. : ** Diptera I. Forsta Underordnungen. Orthorapha. 



Audra 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 Eegion," 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 bulkiest 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, pis. 4-32, and 2 text maps), 

 containing a new classification of the Tipulidse ; there are also 

 extensive notes on the Odonata. Among the other contributions 

 are Ghadwick's " Catalogue of the Phytoptid Galls of North 

 America " (pp. 118-55) ; 0. S. Thomson's " Discussion of the 

 Male Genitalia in Odonata " (pp. 249-63, text figs. 17-28) ; and 

 Felt's "Further Work on the Cecidomyiid^ " (pp. 286-422, text 

 figs. 29-49, pis. 33-44). 



Renter has treated in the fullest manner the Palaearctic 

 Hemiptera of the Coniferas (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 



