204 THE ENTOMOLOGIST. 



are apodal) have a singular resemblance to the Thysanura, 

 which are by some also considered to be Neuroptcrous, and 

 it is worthy of notice that the larva of Xenos Rossii (I am 

 not aware if it is the case with others) is saltatorial, just as 

 the Thysanura are saltatorial. — PresidenVs Address to the 

 Enlomolof/ical Society of London, 1865. 



130. Dimorphism in the Genus Cyiiips. — With regard to 

 dimorphism, an important fact has been recorded by Mr. 

 Walsh (' Proceedings of the Entomological Society of Phila- 

 delphia,' March, 18^4, p. 443). He finds that part of the 

 galls of Qnercus tinctoria produce males and females of Cy- 

 nips spongifica in June ; those that remain until October and 

 November, and also in the following spring, produce Cynips 

 aciculata, but females only. Mr. Walsh appears to prove 

 that the latter, although widely different in many respects, is 

 only a dimorphous form of Cynips spongifica. I have already 

 expressed an opinion that in some cases dimorphism may 

 perhaps be dependent on second broods (' Proceedings ' of 

 this Society, April 7, 1862, p. 72), and, if attention was paid 

 to this subject, probably other instances might be found. — 

 Id. 



131. Insects on the Underside of Stones. — I would suggest 

 to our collectors the necessity of following up, in this country, 

 the examination of the under surface of large stones deeply 

 imbedded in the earth. My excellent friend, M. Raymond, 

 of Frejus, first led the way, I believe, to this kind of explora- 

 tion, in conjunction with other French naturalists, and parti- 

 cularly of M. F. de Saulcy, and the result has been the dis- 

 covery of a considerable and always increasing number of new 

 forms, such as Anillus, Microtyphlus, Geodytes, Troglorhyn- 

 chus and others ; so that there is every reason to believe that 

 this hypogaial fauna will exceed, if it does not already do so,' 

 that of the grottoes. Hitherto no hypogaeal species has been 

 detected in this country, but there is surely no reason why 

 some of them may not be found. — Id. 



132. Entomological Collectors Abroad. — I have only to 

 say a few words, in conclusion, relative to our collectors 

 abroad. Mr. Bouchard, who has gone out to the southern 

 shores of the Gulf of Mexico, has, we hear, arrived at Santa 

 Martha, and he is much pleased with the appearance (ento- 

 mologically) of the country. Mr. Bartlett, the naturalist who 



