8 PROCEEDINGS OF THE ACADEMY OF [Jan., 



GRYLLID^J. 



Gryllus bermudensis Caudell. 



This form, recently described on the basis of a single specimen, is 

 represented in the present collection by an interesting series of forty- 

 one individuals taken in Warwick Parish, in Paget West and on 

 St. George Island, on a number of dates in December, January, April 

 and May. The majority of the specimens are accompanied by habitat 

 data, and the whole series presents some light on the extent of 

 variability in size, proportions and coloration in material of this genus 

 from a circumscribed locality. 



The striking coloration of the tj^pe is hardly equalled in the series 

 before us, although closely approached, but in no case is the extent 

 of ochraceous on the head as great as originally described. Mr. Cau- 

 dell, while in Philadelphia, kindly looked over some of the material 

 treated in this connection and, as far as memory served him, he con- 

 sidered the specimens to belong to his species. It is apparent that 

 the majority of specimens are darker and less contrastingly colored 

 than the type, and it is as evident that a considerable amount of color 

 variation is present in the species. From a type with the head and 

 pronotum blackish, marked on the gense, shoulders of pronotum, 

 borders of the lateral lobes, cephalic edge of pronotal disk and around 

 the eyes with ochraceous, and having the tegmina and limbs rufo- 

 testaceous, the series can be laid in a graduated transition to a nearly 

 uniform blackish type. The specimens from the south shore of War- 

 wick Parish exhibit a constant type of coloration for the habitat, 

 four males and two females from this section, all taken in April and 

 May, having the head and pronotum shining black, with little or no 

 ochraceous and comparatively pale tegmina and limbs. A depau- 

 perate pair from the meadows of Paget West, all seen from the locality, 

 are blackish brown without any pale color, except on the angle of the 

 tegmina where there is a touch of testaceous. The other series are 

 either of a uniform type, blackish brown with a limited and variable 

 amount of ochraceous on the genae and pronotum, or each locality 

 has several different shades of coloration. 



In size we have an interesting case of depauperation in five specimens 

 from Paget West and Warwick Parish Meadows and Warwick Parish 

 without further data, all the other material being of what might be 

 considered more normal size. 



Careful tabulation of the proportions of the ovipositor and caudal 

 femora reveals a variable disparity between the two, and while the 

 correlation with the habitat is barren of results of a positive character, 

 the suggestions are rather significant. The proportions of the females 

 are as follows : 



