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PllOtO. F. X. Clark. 



Larval structure oy Cyaniris semiargus. 

 1. Honey-gland (II), fan-tubes (F), spiracles (S) of the 7th and 8th ab 



DOMINAL SEGMENTS, THIRD 1NSTAU \ 100. 2. TlIK SAME, PENULTIMATE IXSTAH 

 (SHOWING INCKI'lAKE IN M'MKKR OK I.KNTlCLKS liorxi) HONKY-(iLAXl>) X 100. 



A Natural History of the British Butterflies, etc., 1909. 



[To face p. 291.] 



