ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 581 



close of the growth period, does not refute the suggestion that the initial 

 vohime is increased six-fold during this period. 6. If coincidence is 

 not responsible for the apparent connexion between the ratios mentioned 

 above, correlation is established between the cell volume and length of 

 spindle in the spermatogenetic metaphases of this species. 



Nervures of Anterior Wings in Ants.*— C. Emery discusses the 

 venation of the anterior wings in Formicidse. In the more primitive 

 insects there are numerous longitudinal nervures united by transverse 

 nervures : in the more differentiated types both sets are greatly reduced 

 in number. In some Formicidae there are relatively indifferent types 

 of venation, e.g. in the males of Eciton ccemm ; in other forms there is 

 considerable reduction. Thus in Formica there are only two cubital 

 cells. The venation is exceedingly useful in classification, but it must 

 be dealt with in a critical way. 



Spermatophore-like Structures in Trichoptera.t — N. Cholodkovsky 

 has found in the bursa copulatrix (or true receptaculum seminis) of 

 Goera pilosa and Molanna angustata,SL spermatophore-like structure. It 

 probably corresponds to the " spermatodose " in the sperm-receptacle of 

 Locustid^. 



Antennas in Various Castes of Termites. J — E. Bugnion gives a 

 list of Indo-Malayan termites with a note on the number of joints in 

 the soldier, the worker, and the imago. The number increases after 

 hatching, usually by the repeated division of the third joint. The 

 number is not quite constant in each species. The imago has very often 

 one more or two or three more than the worker or soldier. The soldier 

 has often one more than the worker. The soldier may have the same 

 number as the worker or the same number as the imago. Bugnion 

 notes that the young cockroach (Blatta americana) (4^ mm. in length) 

 has 37 joints and the adult male 166. 



Apterygota of Clare Island. § — G. H. Carpenter reports on a 

 collection of two Thysanura (Bristle-tails) and eighteen CoUembola 

 (Spring-tails) from Clare Island. Most are common and widespread 

 Irish species, but Fulsomia iv-occulata (Tullberg) is new to Ireland. 

 Two distinct shore-haunting species have been hitherto included under 

 the name Petrolius (or Machilis) maritimus Leach. A generally 

 northern facies is presented by the fauna. 



S. Arachnida. 



Coxal Glands of Arachnids. || — B. H. Buxton has studied the struc- 

 ture of these organs in scorpions, Pedipalpids, spiders, Solifugae, and 

 Phalangids. In scorpions, Pedipalpids, and true spiders, there is a 

 saccule, a collecting tubule, a labyrinth with striated cells, and an outlet 



* Eov. Suisse Zool., xxi. (1913) No. 15, pp. 577-87 (4 figs.). 



t Zool. Anzeig., xlii. (1913) pp. 531-3 (3 figs.). 



X BuU. Soc. Vaud. Sci. Nat., xlix. (1913) pp. 165-72. 



§ Proc. R. Irish Acad.,xxxi. (1913) pt 32, pp. 1-12 (1 pi.). 



II Zool. Jahrb., 1913, Suppl. 14, Heft 2, pp. 231-82 (43 pis. and 7 figs.). 



