528 SUMMARY OF CURRENT RESEARCHES RELATING TO 



the British fauna. They have been able to add Isotoma sexoculata 

 Tullberg, found under stones below high-water mark on the shore of 

 the Firth of Forth at Dalmeny ; Achorutes manubr talis Tullberg, from 

 Perth ; A. propinquus sp. n. (= A. manubrialis of the 1899 list) ; and 

 Xemjlla maritima Tullberg, from Kirkcaldy. 



New Machilidae.* — Filippo Silvestri establishes the new genus 

 Machiloides, with Machilis appmdiculata Silv. as type. His conspectus 

 of Machilid genera includes Petrooius Leach, type P. maritimus Leach ; 

 Machilis L., type L&pisma poli/poda L. ; Prmnachilis Silv., type P. 

 excelsior Silv.; Machiloides g. n., type Machilis appendiculata Silv.; 

 Meinertellus Silv., type M. pulvillatus Silv.; and Machilinus, type M. 

 rupestris Lucas (vel M.grassii Griard). 



He also describes \Machilis alter nata sp. n., and Prcemachilis meti- 

 culosa sp. n. ; and gives an analytical table of the Italian Machilidae. 

 We give these details became of the systematic importance and general 

 zoological interest of these primitive insects. 



Enemies of Roses.f — Fr. Richter von Binnenthal has devoted a 

 book to the anitmls that injure roses. He discusses the various modes 

 of injury, from leaf-eating to gall-forming, the life -histories of some of 

 the injurious forms, the means of cure aud prevention, and so on. As 

 most of the enemies are insects we have inserted our reference here, 

 but the book also takes account of Tetranychidaj, Nematodes, etc. It 

 is not exactly a book for specialists, but the reference may be useful 

 to many friends of roses who are interested in the pathological aspects 

 of rosiculture. 



Habits and Development of Neocerata rhodophaga.t— F. M. 



Webster has investigated the life-history of this rose parasite infesting 

 rose-houses in the vicinity of Chicago, but not attacking plants in the 

 open. It affects most seriously a species of rose that requires a very 

 warm, yet ventilated environment. It is not a native, and its gradual 

 occurrence further and further inland does not imply an American 

 origin. It is closely related to the European form Dichelomyia rosarum 

 Hardy. 



Life-History, Habits and Taxonomic Relations of a New Species 

 of Oberea.§— F. M. Webster gives an account of 0. idmicola Chittenden, 

 a beetle of remarkable habits. Thus far it has been found only in a 

 single city in central Illinois infesting the elm. Even there it has 

 confined itself to a certain section of the city, within which it is so 

 excessively abundant that the females are compelled to deposit their 

 eggs in the same twigs again and again, notwithstanding the fact that 

 only a single larva can survive in each twig. This congestion in 

 numbers and restricted distribution, might be taken to indicate a spirit 



* Redia, ii. Fasc. 1 (1904) pp. 1-9. 



t Die Rosenschadlinge aus dem Tierreicbe, deren wirksame Abwehr und Bek'anip- 

 fung. E. Ulmer, Stuttgart, Svo, 1903, x. and 392 pp. See also Biol. Centralbl. 

 xxiv. (1904) pp. 478-80. 



1 Bull. Illinois State Labor, of Nat. Hist., vii. (1904) pp. 15-25 (1 pi.). 



§ Tom. cit., pp. 1-14 (2 p!s.). 



