310 SUMMARY OF CURRENT RESEARCHES RELATING TO 



the effect of the parasitism on the host, the sexual dimorphism and the 

 internal structure, and takes a systematic survey of all the known forms. 



New Strepsipteron.* — K. Hofeneder describes Menyenilla chobautii 

 g. et sp. n., from North Africa, a Strepsipteron allied to Mengea from 

 Baltic amber, notably in having a 5-jointed clawed tarsus. The C-jointed 

 antennas have joints 3 to 5 prolonged into lateral processes. 



New Species of Fossil Cockroach.-)- — H. Bolton describes an Orthop- 

 teron wing from the South Wales coal-field, and refers it to Archimylacris 

 (Etoblattina) woodwardi sp. n. 



&• Myriopoda. 



New Millipedes.} — F. Silvestri describes a number of new forms 

 from Uganda, establishing the following new genera : Eviulisoma, Rha- 

 pidostreptus, Analocostreptus and Metriostreptus. He also gives § pre- 

 liminary descriptions of ten new genera of Diplopoda from Mexico, South 

 America, and other countries. 



Structure of Polydesmus.|| — W. Effenberger has done a useful 

 piece of work in giving a clear account of Polydesmus complanatus — 

 especially of its external characters, respiratory system, alimentary tracts, 

 glands, and reproductive organs. He also discusses this millipede's habits. 



5. Araclmida. 



Fragmenta Arachnologica.^f — VI. Kulczynski describes some new 

 Mediterranean species of Palpimanus, and submits additions to or cor- 

 rections of previous descriptions of various species of Araneus, Xystkus, 

 and Lycosa. 



New Cteniform Spiders from South America.** — Embrik Strand 

 reports on a number of interesting forms with a general resemblance (in 

 the disposition of their eyes) to the genus Gtenus, e.g. new species of 

 Acanthoctenus, Gtenus, Enoploctenus, Gupiennius. 



Development and Origin of Respiratory Organs in Aranese.-f-j— W.F. 

 Purcell has studied the development of the lung-books, of the tracheae, 

 of the abdominal longitudinal muscles and their tendons, of the enta- 

 pophyses (ectodermal tendons) of the pulmonary segment, and other 

 associated structures. Forty-one species of spiders were used for ana- 

 tomical purposes. The development was studied chiefly in Sitticus (Attus) 

 fioricola O.K. We shall state some of his general conclusions. 



The medial trunks of the trachea? must be regarded as equivalent in 

 their entirety to metamorphosed entapophyses. 



The pair of lateral branches of the trachea? of the ninth somite in 



* Ber. Nat. Med. Ver. Innsbruck, xxxi. (1910) pp. 33-58 (1 pi.). 



t Geol. Mag., vii. (1910) pp. 147-51 (1 pi.). 



% Ann. Mus. Civico Storia Nat. Genova, iv. (1910) pp. 457-78 (9 figs.). 



§ Zool. Anzeig., xxxv. (1910) pp. 357-64 (10 figs.). 



|| Jen. Zeitschr. Natur., xliv. (1909) pp. 527-86 (4 pis. and 13 figs.). 

 i Bull. Internat. Acad. Sci. Cracovie, 1909, pp. 667-87 (1 pi.). 

 ** Zool. Jahrb., xxviii. (1909) pp. 401-28. 

 tt Quart. Journ. Micr. Sci., liv. (1909) pp. 1-110 (7 pis. and 7 figs.). 



