130 THE entomolocjist'.s uecord. 



ajitrriis, obtained by direct enlargement in the camera, and extremely 

 clear in definition and detail. Silk of Tephrosia bistortata. — Mr. 

 Tutt exhibited some of the silk used by Tcphioxia bistortata to cover 

 its ova, and discovered by Dr. Riding. It was contained in a pouch 

 at the extremity of the abdomen, in the form of dense bundles about 

 2 mm. long, and resembling, in miniature, locks of wavy flaxen hair. 

 Hitherto all such coverings were supposed to consist of scales from the 

 anal segment. 



Committee for the pkotection of insects in danger of extermi- 

 nation. — At the meeting of the Entomological Society of London, 

 held on the 7th instant, the following memorandum of association was 

 adopted and signed by the President, the Council, and many 

 members : — " We, the undersigned, being desirous of protecting from 

 extermination those rare and local species of insects which are not 

 injurious to agriculture, nor to manufactures, do hereby agree, by our 

 own example, and by the exercise of our influence over others, to 

 discourage the excessive collecting and destruction of those species of 

 insects which, from their peculiar habits or limited range, are in 

 danger of extermination in the United Kingdom. We further agree 

 to accept, for the purposes of this association, such lists of species in 

 need of protection as shall be drawn up, and from time to time, if 

 necessary, amended, by the committee of the Entomological Society 

 of London appointed to this end." A copy of this memorandum of 

 association has been forwarded for signature to such of those societies 

 which have expressed themselves as being in sympathy with the objects 

 of the committee. — C. G. Barrett, F.E.S., Hon. Sec, 39, Linden 

 Grove, Nunhead, S.E. April Idth, 1897. 



:iS\EVIEWS AND NOTICES OF BOOKS. 



On mechanical selection and other problems. By Karl Jordan, 

 Ph. D. [From Nuritate>i Zoologicac, Dec, 1896. — Quarto, 100pp., 

 4 pL] . — This is a paper that every scientific entomologist must read. 

 It deals with the principles of " physiological selection," the accessory 

 organs of the reproductive system of lepidoptera, the value of the term 

 " species," etc., with special reference to the genus Pajrilio, and the 

 philosophical questions arising therefrom. The paper is carefully 

 worked out and closely reasoned, and the whole essay deserves the 

 careful study of all entomologists. 



Practical hint on Apamea ophiugramma. — Now is the time for 

 larvfe of A. nplriofiranima. Here and there the striped grass shows a 

 drooping or faded leaf. Find the bottom of the infected shoot and pull, 

 avoiding pressure as much as possible. In the stem, generally head 

 upwards, lies the larva. It feeds only as far as the solid or semi-solid 

 part of the stem goes. When that is gone it leaves for another stem, 

 which it enters by making a large, irregular hole near the ground. — 

 (Rev.) C. R. N. Burrows. Ajirii 2itl,, 1897. 



¥jimxT\.~ 'J'ili(ire<( aurdijo.— p. (il, line 1, for " Sept. 4th, 18U(J," read "Oct. 

 4th, 18i)0." Cirrlioedia xeraiiipeliiia.— ]}. (JO, line '2-5, for "Aug 4th, 1890," read 

 " Sept. 4th, 1890. - W. B.\RNEa, 7, New Uoad, Eeiuling. 



p. 44, line 9 from bottom, for " Axpidiajnoi " read " Asiiiiliotits."' p sO, line 

 (), for " specimen" read " species. " 



