NOTKS ON AGRIADES THETIS (bELLAKGUs). 113 



on the outer half of the fringe. In another example, the failure is in 

 the outer half of the fringe, only two strife extending through the 

 fringe on one wing, the rest terminate as in the more advanced forms 

 of Poli/onDiiatiis icariis, I'lcbciiis anpiK, and Aricia aatrarche. It often 

 happens that the outer half of the fringe is darker that the inner 

 half, or that a dark line occurs in the middle of the fringe running 

 parallel Avith the wing outside. Sometimes the marks in the outer half 

 of the fringe tend to form a band parallel to the wing margin. 



InTERXEURAL markings in the ^ = ALBOLINEATA, TuTT. A fomi 



with white lines inside the margin and no black spots, was well- 

 marked and somewhat prevalent in the second brood in 1903, at 

 Folkestone and Dover, but since that year I have in vain endeavoured 

 to supplement and replace that form in my collection. 



A. ab. PUNCTA, TuTT. — The form with black submarginal spots with 

 a white edge is common enough, as also is one having white lines 

 with more or less of a black spot. The combination of these markings 

 in a greater or lesser degree, is certainly the commonest form in my 

 experience from 1904 to 1909 in Kent, Surrey, and Sussex. I append 

 statistics from my series, which consists of 194 specimens, 126 upper- 

 side, and 68 underside. '•■ 



II. 



124 

 Interneural markings on upper wings. — In the eleven specimens 

 showing this character, it is not a mere partial presence of some black 

 or white scales or both, but markings are distinctly present, as can 

 be proved by examination with a lens. These markings may be 

 described thus : — 



I. In two or three specimens a shade, usually subtiiangular in shape, with 

 apex pointing towards the base. 



II. A number of white scales occupying part of the space immediately inside 

 the marginal black in the anal angle of the wing. In one specimen the black 

 margin is throughout a very delicate line, but is partly obliterated in the anal 

 angle by the presence of the white scales. 



III. In two specimens both black and white scales are present in no fewer than 

 six of the interneural spaces. The white scales are, of course, external to the 

 black ones in position. 



IV. In one specimen shades of black scales of arrow-head shape occur in the 

 interneural spaces, leaving in the lower spaces plain blue ovals on the margin. 



In the apex of the forewing, black scaling is of course not un- 

 common, and some of the rest are no doubt developments of this. 

 In Surrey, Sussex, and Kent, I should be inclined to consider the 



* Eight are striata, obsoleta, etc., and not tabulated. 



** Eleven have distinct interneural markings in margins of forewings. 



t Five of these have whitish lines edged with black scales. 



"[ The best ab. puncta, is devoid of white, but most have a few white scales. 



