44 SUMMARY OF UUKKENT UKSEAKCHKS RELATING TO 



Head-glands of Caddis-worms.* E. L. Russ has studied the glands 

 in the head of larval Trichoptera, especially those of the fourth and 

 fifth head-segments. Two different types occur : the Limnophilid 

 type, consisting of a group of more or less distinct cells opening into an 

 efferent duct, and the Rhyacophilid type, consisting of closely com- 

 pacted glandular cells radially disposed around a central canal. An 

 extra pair of internal mandibular glands is reported in the larva of 

 Rh yacophila o b I iterata . 



Injurious Insects in Ireland. f — George H. Carpenter reports on 

 injurious insects and other animals observed in Ireland during the year 

 J'.»0'.», such as the March moth (Auisopteryx sescularia Schiff), the 

 female of which is wingless, like that of the allied winter moth ; the 

 fir-seed Chalcid (Megastigmus strobilobius Ratz.), the ox-louse {Hsemato- 

 pinus eurysternus Xitzsch). Besides insects, he deals with spotted 

 Millipedes ( Blaniulus), which enter potato-tubers by minute lesions, 

 the harvest bug (Trom Iridium), the root-knot eelworm (ffeterodera 

 radkicola Greef), which has hitherto been unknown in Ireland, and 

 other animals. 



Notes on Chermes pini. J — Paul Marchal suggests that the extra- 

 ordinary mechanical activity of the migration in the sunshine, followed 

 by abundant absorption of sap when they settle, may be connected in 

 these insects with the bringing on of the production of sexual forms. 

 He also calls attention to interesting intermediate forms between the 

 "" exules alatae " and the " sexuparous " forms. 



@. Myriopoda. 



Cavernicolous Myriopoda. § — H. W. Brolemann continues his studies 

 in " biospeleology," and reports on a number of Myriopods from caves. 

 He deals with Scutig&rella immacidata Newport among the Symphyla, 

 Polyxenus Jucidus among the Pselaphognatha, a number of Polydes- 

 moidea, and Callipus fatidissimus Sav. among the Lysiopetaloidea. 

 Among the Polydesmids is a new genus, Haploleptodesmus. 



8. Arachnida. 



Palpi of Male Spiders. j| — J. H. Comstock describes some of the 

 types of palps, and seeks to establish a satisfactory nomenclature. He 

 begins with a generalized type of palp, as in Filistata and Eurypelma, 

 and works on to the highly complex types, as in Linyphia and Aranea. 

 An account is given of the numerous different parts in a specialized palp, 

 and emphasis is laid on the importance of describing palpi from expanded 

 specimens. 



New Ixodidse.lf — L. G.Neumann describes the following new species : 

 Ixodes elegans from Chili, Aponomma pattoni from India, Rhipicephalus 

 planus from S. Cameroon, and Argas delicatus from Central Asia, and a 

 number of imperfectly known forms. 



* Arch. Zool. Exper., v. (1910) Notes et Revue, No. 3, pp. lxi-lxvii (2 figs.). 

 t Econ. Proc. R. Dublin Soc, ii.(1910) pp. 8-30 (1 pi. and 10 figs.). 

 X Comptes Rendus, cli. (1910) pp. 832-4. 

 § Arch. Zool. Exper., v. (1910) pp. 339-78 (4 pis.). 

 || Ann. Entomol. Soc. America, iii. (1910) pp. 161-85 (25 figs.). 

 If Ann. Sci. Nat. (Zool.) xii. (1910) pp. 160-76 (12 figs.). 



