IWTEODUCTIOIT. 13 



"head. The connection appears to last several hours, as observed 

 in captivity. 



In another species, F. lesnei, Finot, not uncommon in West 

 Central Europe, Lesne observed a pair in coitu while hanging from 

 the under surface of the cork of a tube : in this case, the ventral 

 surfaces of the two individuals were juxtaposed. 



In Chelklura aptera, Charp., a European Alpine species, de 

 Bormans observed that the male applied the underside of his 

 forceps to the ventral surface of the female. This ])osition 

 involves the torsion of the abdomen of the male as Gadeau de 

 Kerville observed. Xambeu noted the same thing in an allied 

 species, Ch. 2^yi'enaica, Gene. Bennett observed the same fact in 

 Anisolahis maritima in New York, and Gadeau de Kerville noticed 

 it in Anisolahis mauritanica, Luc. The copulation of Labidura 

 riparia, Pallas, as observed by Sopp, is effected in the same way. 

 The copulation of Dlplatjis r/reeni is described as follows by 

 Green : — " On Oct. 27, 1897, a pair of this new species, reared up 

 in captivity, were found in coitu. The abdomen of tlie male was 

 twisted round and the extremity was closely applied to the under 

 surface of the pygidium [? penultimate ventral plate] of the 

 female." 



Ouijposition, 



In Ceylon, Green observed Diplatys greeni in coitu on Oct. 27th : 

 the first eggs were deposited on Nov. 4th, that is only a weelv later, 

 and other eggs were added at intervals, during the following 

 week, until a total of twenty-five had been laid. They were 

 scattered singly over the exposed surface of the moss-covered bark, 

 which had been provided as a shelter for the insect, adhering 

 slightly to their support. Towards the end of the egg-laying 

 period, a few were deposited in irregular clusters and unattached 

 to the moss. 



In Sweden, de Geer found the newly hatched larvae at the 

 beginning of June, and the writer has found them in the south of 

 England in April. De Geer also found a female (F. auricularia) 

 with her eggs under stones in April. Tascheuberg found the ova 

 in Europe on February 19th after an exceptionally mild winter, and 

 the larvae emerged on March 7th. Camerano found the ova in 

 Southern Europe as early as January 24fch, and the larvae emerged 

 on 30th Januaiy- With regard to the period between fertilization 

 and oviposition, the same author records a female, which he had 

 taken during the winter, laying eggs on 10th March ; and in 

 temperate latitudes it is probable that this period is generally a 

 good deal longer than in warm countries. Riihl records the 

 emergence of young larvae from ova which had been 26 days in his 

 possession. 



With regard to Ghelidura pijrc^iaicn, Gene, in the Pyrenees, 

 Xambeu records that copulation occurs in April or May, 



