28 A A Neio Cricket of aquatic habits found in Fiji. 



fenestrae, aud only three articulated spines on the iinicr 

 side of the tibia. 



The aquatic cricket from Fiji agrees with the Trigonididfe 

 among the tribes of Gryllidte,* except in the number of 

 the articulated spines of the hind tibia and the character 

 of the male wing-cover. Saussure, who, of course, was 

 unaccjuaintcd with this form, says (loo. cit., p. 51)0), tliat 

 in male Trigonidida) the elytra are sometimes devoid of 

 tambour (stridulating apparatus), and are then identical 

 Avith the elytra of the female ; or they may be furnislied 

 with a complete and well-developed tambour. In our 

 insect the male elytron or wing-cover differs greatly from 

 that of the female, and yet is not completely equipped 

 for stridulation. The ovipositor of the female closely 

 resembles the peculiar ovipositor of Cyrtoxiphus,-]- and 

 the partly coriaceous, partly membranous wing-covers, as 

 well as the presence of two fenestr^e in the fore tibia, also 

 approximate it to the genus Cyrtoxiphus. Brunner von 

 Wattenwyl :j: has described a genus of Trigonidida'. (Amu- 

 surgus), in wliich the male elytron has no tambour or 

 strichdating organ, and the new Fijian cricket seems to 

 come very near both to Amusurgus and to Cyrtoxiphus. 

 Few details of the male elytron of Amusurgus are given, 

 but it appears to differ from the same part in our cricket, 

 being narrow and silky (" angusta, huloscricea "). The 

 hind tibia has four movable spines on each side. 



It is necessary, we think, to place our aquatic cricket 

 in the tribe Trigonidida;, where it will be distinguished 

 by the male elytron being partly membranous and 

 altogether unlike that of the female, but without func- 

 tional stridulatiny- organ, while the hind tibia bears two 

 series of articulated spines. It seems necessary to recognize 

 tiie goiuis as distinct, and we propose for it the name of 

 Hydropcdcticus.%^ The species may be named //. viticnsis. 

 Dr. Brunner von Wattenwyl, to whom we have submitted 

 our description and drawings, tells us that he has no 

 doubt of the correctness of the systematic position thus 

 assigned to the new cricket from Fiji. 



* Saussure, Melanges Orthopt., toia. II, p. 185. 

 t Ihid., p. (501. 



X Rev. (In Sy.st. des Ortlioptcies, 1893, pp. 207, 212. 

 i^ Suggested by Mr. B. M. Connal, lecturer in Latin to the York- 

 bhire College. Uiidfopcdetkus means leapinrj on water. 



