go ENTOMOLOGICAL NEWS. [Feb., '13 



Fall, H. C. A review of the North American species of Collops, 



6, xx, 249-274. Gebien, H. Neue kaefer aus der familie Tenebrion- 

 idae des museums Wiesbaden, 187, Ixv. 232-248. Pic, M.> C. nou- 

 veaux de diverses families, 60, xxii, 455-458. Prell, H. Revision 

 des Dynastinen-genus "Heterogomphus," 201, xx, 93-176. Raffray, 

 A. Pselaphides de la Republique Argentine, 60, xxii, 447-450. 



HYMENOPTERA. Bertoni, A. de W. (See below.) Branner, 

 J. C. Geologic work of ants in tropical America, 355, 1911, 303-333. 

 Casteel, D. B. The behavior of the honey-bee in pollen collecting, 



7, Bui. 121. Mignault, J. B. Les Ammophiles. "Comme au pays 

 de J. H. Fabre," 55, xxxix, 82-94. Schneider, K. C. Orientierung 

 der bienen, 191, iv, 148-151. Sladen, F. W. L. Bee with Pollinia 

 attached to its feet, 18, xxvi, 116-117. 



Bartlett, O. C. The North American digger wasps of the sub- 

 family Scoliinae, 180, v, 293-340. Bertoni, A. de W Contribucion 



a la biologia de las avispas y abejas del Paraguay, 60, xxii, 97-146. 

 Ducke, A. Die naturlichen bienengenera Sudamerikas, 89, xxxiv, 

 51-116. Forel, A. Formicides neotropiques IV VI, 201, xx, 1-92. 

 Fullaway, D. T. Gall-fly parasites from California, 6, xx, 274-282. 

 Jorgensen, P. Los Cresididos y los H. Aculeatos de la Provinca 

 de Mendoza, 60, xxii, 267-338. Schulz, W. A Aelteste und alte H. 

 skandinavischer autoren, 24, Ivii, 52-102. 



REVIEW. 



TROMBIDIIDAE, By A. BERLESE. Redia, Vol. VIII, fasc. i. June 

 29, 1912. This monograph of the so-called "harvest mites" consists of 

 291 pages, and contains 137 text figures and one colored plate. The 

 numerous genera into which this family has recently been divided 

 are here for the first time clearly defined. The author gives in a 

 few semidiagramatic figures the principal characters of the differ- 

 ent genera. He also follows the excellent practice of tabulating all 

 the important generic characters, and grouping, by means of keys, 

 the different genera into separate tables according to the variations of 

 a single character. By such an analysis the range of structural 

 variations is made clear, and the correlation of these variations is 

 made possible. Thus the natural affinities of the genera being ex- 

 posed, their natural arrangement follows with ease. Besides, this 

 method enables one frequently to place poorly preserved or mutilated 

 specimens with facility and certainty when it would be impossible to 

 do so by means of a single complicated key which should require the 

 ascertaining of many, if not all, of the generic characters con- 

 sidered. 



At the end of the work the various species are arranged into 

 tables according to the countries in which they are found. Also a 

 synonymical table and bibliography are given. 



It is unfortunate that some of the common species found in this 

 country are omitted in this work. H. E. EWING. 



