January 1SS9.] 



PSYCHE. 



149 



15 Aug. Fourth molt. 



The venter was hlack, and the props 

 were bhick with white tips. On first 

 and second segments, the arrow-heads 

 ■were replaced by vertical black dashes, 

 extending nearly to the dorsal line. 



The yellow one came out with the 

 body black, the hair Maltese-gray, light- 

 er over the head ; pencils darker gray 

 with black tips. The gray one was like 

 it. 



36 Aug. Adult larva, 51 mm. long, 

 densely covered with long silk}' hair — 

 varying in color from jjure white to deep 

 gray. Pencils almost black with black 

 tips. Head gray. 



Bodv hardl}' to be seen but black 

 wherever visible. Props black with red 

 tips. Feet black. 



27 Aug. Three shed all their pencils 

 and long hair, emptied themselves, and 



crawled rapidly about as if hunting for 

 good places to pupate. Rotten wood 

 and bark were provided, but no attention 

 was paid to them, and no signs of spin- 

 ning were found. 



30 xA-Ug. The pupae appeared, bright 

 apple green, with three abdominal rows 

 of gray dots, at first, but they soon be- 

 came of a uniform mahogany color, very 

 shining and bright, about 19 mm. long. 



Some were in close tins, and some in 

 a paste-board box, bvit those in tin pupa- 

 ted first. 



The larvae fed on sassafras grew faster 

 and larger than those fed on ash, and 

 molted and pupated earlier. 



As the larvae grew older thev chose 

 older leaves, in preference to young and 

 tender ones, as food. 



This I have noticed with all my larvae 

 this year. 



ELECTRIC LIGHT CAPTURES. 



BY JOHN IIAMII.TOX, ALLEGHENY, PA. 



The reputed raritv of an insect is fre- 

 quently o^ving to its abilit}' to conceal 

 itself and a want of knowledge in the 

 collector regarding its habits, whereas 

 it may be really abundant. This is 

 exemplified in the instances of Caloso- 

 ma scrutator and C. willcoxi. During 

 near twenty years of collecting here I 

 only took a single living specimen of 

 each ; Mr. Klages who has collected 

 near half that time — and carefully, w^as 

 not more successful, nor were several 

 amateurs whose collections were seen. 



Yet all this time there were thousands 

 of these insects about us as we now know. 

 This year (1S88) the evenings of 9, 10 

 and 1 1 May were warm, temperature 

 60° to 65° F. During one hour of each 

 of these evenings I picked up from the 

 platform of an open pavilion in one of 

 our parks in the centre of the city, 

 to the corners of which powerful elec- 

 tric lights were suspended, ninety $ 

 and thirty $ Calosoma scriitator ; one 

 hundred and ten 9 ^^^d twenty-six $ 

 C. xvillcoxi. Three weeks of low tern- 



