62 THE ENTOMOLOGIST. 



Keiimare ; and is found also occasionally at Killarney ; Cappagh 

 {Miss V.) and Dromana, Co. Waterford ; Greystones, Co. Wick- 

 low, &c. The darkest unicoloroiis forms of this species are 

 very rare in Ireland. I have one or two of bistre-brown or 

 blackish tone, taken at Killarney and Castle Bellingham ; but 

 two sooty-black specimens, with a faint pale submarginal 

 festooned line identical with the melanic Yorkshire variety, 

 have been captured by Mr. Dillon at Cloubrock, Co. Galway ; 

 and somewhat resemble the black Swansea variety of 'rcplirosia 

 crepuscular ia. Curious aberrations may also be noted devoid of 

 almost any markings, except a large dark blotch at the junction 

 of the elbowed and submarginal lines, half-way between the anal 

 angle and the costa of the fore wing, similar to that shown in 

 Tcphrosia consonaria I have not been able to trace any 

 response to environment in the occurrence of any of the above 

 forms or varieties in reference to their respective habitats. In 

 Kerry the whitish and grey and melanic aberrations occur side 

 by side. Probably, however, the whitish and grey forms would 

 find themselves protected when resting on birch trees where 

 they are numerous. I am inclined to think, from observations I 

 have made, that these insects frequently choose a resting spot 

 which conforms to the hue of their wings. 



(To be continued.) 



ON THE GENUS GYMXOPLEURUS, Illiger; WITH A LIST 



OF SPECIES AND DESCRIPTIONS OF TWO NEW 



GENERA. 



By John W. Shipp. 



The genus Gi/mnopleurus was founded by Illiger (Mag. ii. 

 1803, p. 199) for the receptacle of the section of the then 

 Scarabffiidfe (Ateuchini) having the dorsal margin of the first 

 segment of the abdomen uncovered, and the elytra having the 

 lateral margins strongly sinuate near the base. 



The characters by which Macleay (Horse Ent. p. 510 et scq.) 

 sought to arrange the species in divisions were chiefly founded 

 on the number of teeth on the clypeus, and other variable and 

 slight characters. 



This genus, of which sixty-two species were enumerated by 

 Harold (Cat. Col. Scar. 1868), has since been augmented to 

 105 ; and I do not doubt that in a few years it will be still 

 largely increased, now that the interior of the African continent 

 is being opened up, and becoming more thickly populated. 



The species of the genus are as follows : — 



