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The Museum Gazette 



advantage of a warm day to come forth, and if they cannot 

 find some food at once, the more delicate ones are apt to die 

 off. The curious larva of the Purple Emperor Butterfly 

 (Apatura iris) is a case in point. It passes the winter, when 

 it is about half an inch long, fastened by a silken pad in the 

 fork of its food plant (Sallow), and even if the leaves are well 

 advanced when it begins to move it will not always feed 

 readily. Sometimes it will travel a long distance in search of 

 a leaf to its taste, and finally, refusing to feed, it will shrivel 

 up and die. This may sometimes be due to the presence of 

 an ichneumon larva within, but the parasite generally takes 

 good care to avoid the vital organs of its host, even up to the 

 time of the latter's pupation. 



A round of the gas lamps about n p.m., especially on a 

 warm damp evening, will be profitable during the latter part 

 of the month. Many of the common Noctuae will be found, 

 and some geometers, such as the handsome Oak Beauty Moth 

 (Biston stmtaria). The male is much more frequently seen on 

 lamps than the female. 



OUR LEXICON PAGE— EXPLANATION OF 

 SCIENTIFIC TERMS. 



(Continued from p. 404.) 



Pleuro (Greek, pleura, the side). All words beginning with 

 pleuro are to be understood as referring in some way to the 

 side of the object described. The pleura is the lining of the 

 chest cavity. It also invests the lung, and a. pleurisy or pleuritis 

 is an inflammation of this side chamber. If you have a fixed 

 pain in the side of the chest it is a pleurodynia. Fish which 

 appear to swim one side uppermost (flat fish) are Pleuro- 

 nectidcB ; animals which manage in some fashion to fly by the 

 aid of skin webs extending along their sides (flying lemurs, 

 flying squirrels, &c.) are said to be pleuroptera, or side winged, 



