26. 



ON THE OCCURRENCE OF CALLOSITIES IN CYPR.EA 

 OTHER THAN CY. BICALLOSA AND CY. BHI^O- 

 CEBUS; AND ON THE OCCURRENCE OF A SULCUS 

 IN TRIVIA. 



By Agnes F. Kenyon. 



(Communicated by John Brazier, F.L.S.) 



I have lately come across several specimens of different species 

 of CyprKa (helvola, tabescens, miliaris, erosa), which have the 

 termino-dorsal arches adorned with callosities. Though these do 

 not occur in every specimen, still finding it in several specimens 

 of the genus, it proves that it is not an abnormal incident; and 

 therefore I think the circumstance deserving of being recorded. 



Cy. helvola (callused variety) possessing a double or twin 

 callosity at the posterior extremit}'; the callus is not so well 

 defined anteriorly, though in some specimens well marked; 

 extremities white. 



Cy. tabescens (callused var.) : extremities with a callus more or 

 less conspicuous, and in some instances furnished with two at the 

 posterior extremity. 



Cy. erosa (callused var.) : differing in no respect from the nor- 

 mal type except in having at both extremities more or less well 

 defined callosities; some specimens bear double ones on the 

 posterior terminal arch. 



Cy. miliaris (callused var.) : evidently a lighter variety, but 

 bearing a well marked callus. 



Cy. carneola (pustulated var.): I have several specimens of this 

 species, in which the margins are pustulated; this I should say 

 was rather a rare occurrence, though evidently not unique. 



Cy. lynx (pustulated var.): I have several specimens even 

 more pustulated than those of Cy. carneola. 



