532 Rev. K. St. Aub3^n Rogers' Bionomic Notes on 



marks of tcncUa, — especially the female of this latter, in 

 which the triangles are less prominent and less sharply 

 defined. In cahira and in the most fully-developed 

 cahiroidcs, these markings are of a cream tint and very 

 conspicuous. In all characters hitherto mentioned except 

 the overspreading ochreous shade the tcnclloicles form 

 tends to assume the pattern of its own male, and it might 

 be held that this and not the mimicry of tenella is the 

 significance of the difference between the two female 

 forms of alia a. 



The pattern of the male is however extraordinarily 

 sharp and conspicuous, while that of tcnelloidcs is obscured 

 and ill-defined, so that the two patterns, however similar 

 they may prove to be on close examination, have an 

 entirely different superficial appearance. Furthermore, 

 the remaining important characters towards the base of 

 the hind-wing diverge from the pattern of the male alicia 

 and resemble those of tenella. The sub-basal black spots 

 retain the appearance of a double row as in cahiroidcs, but 

 are much reduced in size, while individual spots are lost, 

 especially in the central or intra-cellular part of the series. 

 The male, on the other hand, possesses an irregular single 

 row of very heavily marked black spots, as well developed 

 in the cell of the hind-wing as elsewhere. The points in 

 which the band of tcneUoides differs from that of its own 

 male and from the other female form, bring about an 

 approach towards the pattern of tenella, which can hardly 

 be accidental. In both sexes of tenella there is an irregu- 

 lar double sub-basal row of small spots, of which the 

 largest are a pair (one spot for each row) within the costal 

 margin, while the most numerous form a group within the 

 inner margin. Between these two extremities the rows 

 are only represented by two spots in the cell, of which the 

 outer is usually the more conspicuous and sometimes the 

 only constituent. In the tenelloides form we also find the 

 two prominent costal spots, the numerous small spots at 

 the other end of the series, and the median reduction to 

 one or two spots in the cell. 



Tenella furthermore differs from cahira in the absence of 

 a well-marked bluish-grey basal area within the sub-basal 

 spots, a feature that is mimicked in the best developed 

 cdbiroides females and suppressed in the best developed 

 tenelloides, where the area in question is, as in the model, 

 rather darker than the rest of the under surface, but differs 



