452 SUMMARY OF CURRENT RESEARCHES RELATING TO 



g. et sp. n., a new moth whose larvae eat the olive leaves. G. Martelli 

 records his observations on the scale-insects of the olive and their 

 parasites. P. Silvestri and G. Martelli describe Ceroplastes rusci, the 

 scale-insect of the fig. 



Study of Thysanura.* — F. Silvestri describes new species of Lepisma 

 from South Africa, new genera and species of myrmecophilous and ter- 

 mitophilous Lepismids, new Thysanura from Corfu, and a new Italian 

 species of Japyx. 



Cephalic Glands of Machilis maritima.f — L. Bruntz finds two sets 

 of head-glands— an anterior pair opening at the base of the masticatory 

 cavity near the mandibles, and a posterior pair opening into the excretory 

 canal of the " labial kidneys." The secretion of the first pair may help 

 in mastication, that of the second pair may help to wash out the excre- 

 tory products. The salivary glands described by various workers are the 

 labyrinths and excretory canals of the " labial kidneys." 



Kidney of Machilis maritima.| — L. Bruntz finds in the epithelium 

 of the excretory canals of the so-called kidney of this Thysanuran a highly 

 developed network of tracheae, the .branches of which penetrate between 

 the epithelial cells. He also gives some information as to the cyto- 

 plasmic structure of the cells composing the excretory canals. 



Labial Excretory Organ in Thysanura. §— L. Bruntz distinguishes 

 on this organ, a saccule which eliminates ammoniacal carmin injected 

 during life into the body cavity, and a labyrinth which does the same 

 for carminate of indigo. He describes the details of this labyrinth in 

 Machilis maritima, and his histological results confirm the physiological 

 conclusion (based on injections of carmin) that the organ in question 

 is a true kidney. 



Structure of Collembola.|| — R. W. Hoffmann has made an elaborate 

 study of Tomocerus plimibeus L., with especial reference to the mouth- 

 parts, the cerebral ganglia, the musculature and innervation of the head. 

 He has discovered near the cerebral ganglia two peculiar dendriform 

 bodies — very peculiar cell-complexes — which he proposes to call " head- 

 kidneys." 



f), Myriopoda. 



Studies on Julidae.^f — Karl W. Verhoeff continues his researches on 

 Diplopoda in a discussion of the Julidaa and some Polydesmids. He 

 deals with Leptoiulus and Ophiiulns, LeptopliyUum, Micropachyiulus, 

 Allot yphloiul us, Cylindroiulus, Typhloiulus, Heteroiulus, and Brachyiidus, 

 and with various morphological questions concerning the appendages. 



* Boll. Lab. Zool. Scuola Agric. Portici, ii. (1908) pp. 359-96 (24 figs.), 

 t Comptes Rendus, cxlvi. (1908) pp. 491-3. 

 X Tom. cit., 871-3. § Tom. cit., pp. 1045-7. 



|| Zeitschr. Wiss. Zool., lxxxix. (1908) pp. 598-689 (5 pis. and 18 figs.). 

 f Y Arch. Natur., lxxiii. (1907) pp. 423-74 (2 pis.). 



