xxxiii. '22] ENTOMOLOGICAL NEWS 155 



extremely grateful for a clear exposition of the stages by which the 

 "imaginal buds" of Weismann as seen in the Dipterous maggot, have 

 been evolved, and for an authoritative account of the definite change- 

 undergone by the various internal organs and tissues of the insect body 

 during the actual metamorphosis. Though we realize that these are 

 difficult subjects and that more researches upon the older Holometabola 

 are still needed, we may be allowed to feel disappointed that so little 

 help in elucidating these problems is offered in the present volume. 



The text and figures have been on the whole very carefully prepared, 

 though there are a few errors that need to be corrected. On p. \<>, 

 fig. 7, the letters A, C, M are made to point to the wrong veins. On 

 p. 106 we are told that "the ninth segment has a pair of stiff, bristly 

 cerci" ; the accepted definition of "cerci" makes this statement inaccu- 

 rate. On p. 178 we read that, in the Order Orthoptera, "the female's 

 ovipositor is well and typically developed" ; but this is certainly not 

 true of the Cockroaches and Mantids, included in the Order. On pp. 

 178-9 the definitions of the Orders Plecoptera and Isoptcra leave much 

 to be desired, while the Embioptera or Web-spinners are entirely 

 omitted ! A stereotyped error due to Alvah Peterson and others, is 

 perpetuated on p. 185, where it is stated that "labial palps are absent" 

 in the Diptera ; the latest researches go to show undoubtedly that the 

 labellum is formed from these palps. On p. 269 it is stated that the 

 Coleoptera of the Trias include representatives of the Chrysomelidae 

 and Weevils. This is incorrect ; the only families which can be shown 

 to have existed with any certainty at that time are the Cupesidae and 

 Hydrophilidae, though there is a strong probability that other elytra 

 belonged to the Carabidae, Tenebrionidae and Cerambycidae, together 

 with a few more obscure archaic families. 



In concluding this review we should like to congratulate the author 

 on this his latest work, which is to be strongly recommended to all 

 students who are interested in this fascinating subject. R. J. TILI.YAKU. 



Doings of Societies. 



Entomological Section, The Academy of Natural Sciences of 



Philadelphia. 



Meeting of September 22, 1 ( '21. Thirteen persons present. \ ire 

 Director R. C. Williams presided. 



( iKXF.K.M.. Mr. Rehn gave a brief narrative of the summer field excur 

 sion taken by Mr. Hebard and himself in the western States. Mi 

 Hornig exhibited specimens showing an Knglish method of interesting 

 young people in nature, in this case entomology, and said that he thought 

 Midi methods would be practical here in America. The exhibit consisted 

 of a box of twelve micro-slides of parts of insecst, selling for about 

 two or three shillings, also a book entitled "Butterflies and Moths at 



