'l^ Insecta. 



necessary to erect 4 new genera, while the remainirig species all belong to genera which 

 extend beyond the confines of the Oriental Region. The most remarkable new form is 

 Heterovnirictis cercifer gen. et sp. n., which is unique among CoUembola in possessing 

 a median cercus on the b^^ abdominal segment: a new sub-family is proposed for it. 

 JPseudocyphoderus annandalei gen. et sp. n. was found in the nests of Termites. 



A Catalogue of the known CoUembola of the Oriental Zoo-Geographical Region is 

 given, including 53 species. Among them the paucity of members of the Sub-Order Sym- 

 phypleona is noticable, this Sub-Order being represented by only 3 genera, each with 

 a Single species. H. Scott (Cambridge). 



50) Burr, Malcolm, The Orthoptera of Madeira. In: Ent. Record and Journ. 

 Variation, Bd. XXIV, Heft 2, S. 29—33, pl. 1, 1912. 



The Orthopterous fauna of Madeira has been hitherto very imperfectly known. The 

 author collected in the Island for a week at the end of September and also studied the 

 materiai in the local Museum of the Seminario. As a result he enumerates 29 species 

 as known from the Island, and describes and figures a new species, Platycleis barretii. 

 There are 8 species of DermajDtera, including 3 peculiar species (Perirrhytus edentula 

 Wollaston, P. madeirensis Borelli, and Pseudochelidura scJimitzii Borelll): several Blatto- 

 dea, including one peculiar species, Hololampra infumata Brunner, which Is figured: 

 1 species of Mantodea {Mantis rcligiosa Linn.): 10 species of Acridiodea, 5 of Locusto- 

 dea, and 2 of Gryllodea. The only known Saltatorial Orthopteron peculiar to the Island 

 is Platycleis barretii sp. nov. Among the Acridiodea It is noted that 3 ? of Chorthippus 

 pulvinutus Fisch, de W. — all the materiai that was obtalned of that species ■ — have 

 the clytra and wings strongly abbreviated, though more usually these Organs are longer 

 in the Southern areas of the distrlbution of the species: while the Madeiran race of 

 Caloptenus italicus Linn. has the wings rather deeper crimson than those of the Conti- 

 nental form. H. Scott (Cambridge). 



51) Burr, Malcolm, A new species of Arixenia (Dermaptera). In: Ent. Mo. Mag. 

 Bd. XXIII. Heft 5, S. 105—6, 1 Textfig., 1912. 



An anomalous earwig, Arixenia esau, apparently parasitic on a flying-fox, was des- 

 cribed by Jordan in Novit. Zool., Vol. XVI, 1909, as the type of a new genus, which 

 was placed in a special family Arixeniidae. The present paper contains a figure and 

 preliminary description of a second species of the genus, A. jacobsoni sp. nov., a number 

 of specimens of which were found in a cavern in Java. The author states that the ab- 

 domen of Arixenia $ has 10 fully-developed tergites, as in the h : whereas in the true 

 earwigs the T*"" and 8"' Segments are vestigial in the $. H. Scott (Cambridge). 



52) Camerou, A. E., Structure of the Alimentary Canal of the Stick- 

 Insect, Bacillus rossü Fabr.; with a Note on the Parthenogenesis of 

 this Species. In: Proc. Zool. Soc. London, Heft I, S. 172—182, PI. XXVIII 

 bis XXX, 1912. 



The author summarises his results as follows: — the rectilineal shape of 

 the alimentary canal of Bacillus rossii is what would naturally be expected from 

 the narrow elongated form of the insect. "But the absence of a gizzard, together 

 with the rudimentary digestive caeca and the presence of tubulär filiform organs 

 [on the posterior part of the mid-gut] at once arrest attention. The anterior 

 portion of the mid-gut is puckered owing to the isolation of the circular muscle- 

 bundles. The Malpighian tubes are curiously grouped-in bundles of from three 

 to six, each bündle opening into the gut by a common duct. The small intestine 

 is separated from the rectum by six powerful pyramidal valves. The internal 

 wall of the crop telescopes into the lunien of the mid-gut, and the telescoped 

 portion is reflected on itself in a curious manner". 



The author considers that it is open to make the hypothesis that both sexes 

 existed originally in equal numbers: that the males began to diminish in numbers 

 from some unknown cause, and that the female commcneed to reproduce partheno- 

 genetically to preserve the species from extinction, this process continuing until 

 the male has become almost extinct aad parthenogenesis the normal form of re- 

 production. H. Scott (Cambridge). 



