juiv-AuuMsi ,ss,,| rsrcjiE. (ill 



colored scak-.s, such as sonu- species of I cannot vet \\lioll\ muleistand win 



P//isia present, but I had none at hand the scales of Icpidoptera (Uscharne the 



to e>;anilnc. ) air contained in them so nnich more 



I max here note an interestinLj object reatiilv. when siilijccteil to treatment with 



on which to trv this mode of color- alcohol and chloroform, than do the 



separation — this object is the head of a scales of coleoptera, while, on the 



freshly killed larva of Smer/i//////s. other hand, water will dri\e out the air 



L'pon the application of strong alcohol from scales of coleoptera much quicker 



the tubercles lose their milkv whiteness than from scales of lepidoptera. There 



from the loss of air. thus proving opti- are several things which might cause 



cal coloration. Chlorin bleaching-Huids these phenomena, but I am inclined to 



rapidlv destroy the green color of the the opinion, \\ithout \v,\x\n\^ proved its 



fluids of the head, proving it to be correctness, that their cause is the pre- 



li\ podernial. wiiile the outer cbitin-shell. sence of more oil in the scales of lejiido- 



or co\ering of the head, resists all ptera than in those of coleoptera. This 



bleaching action, remaining green until would concide with the greater lustre of 



it is macerated. lepidopterous scales, and with other 



After what has been gi\'en alreads in points in their ap|)earance. Perhaps 



the descriptive portion of this j)aper the entrance of the shank of the scale is 



there is little to be said, based on m\ onl\ closed with an oih mass, for I 



own work, in regard to the structure of ha\e ne\er seen the scale of a lepido- 



scales. A point uortln of mention is pteron resist entireh' the entrance of 



perhaps thi>^. that I have foiuid but one fluid, as is often the case \\ ith the scales 



insect having scales or hairs, in which of coleoptera. 



these appendages did not contain more The striae upon scales of lepidoptera 



orlessair. Thisin.sectis CJialcolepidi/is. have long been a subject of in\estigation. 



The elytra themselves.' in man\- cases but. as far as I know, no one, up to iS8o. 



where the\ are white (e.g., in Ciciitdcla published the fact that their striae were 



dorsaJ/'s) , have spaces within them. upon the outside, or upon the side turned 



besules the tracheae. I'eservetl tor air. as awav from the wing. In Burgess' paper 



well as spaces for the fluids of the bodv. on /)i7//n/s." i\\ that \ear. be figures 



When so-called ••blooms" are present, transverse sections of the scales of that 



as upon the dorsal surface of the abdo- butterfly, and calls attention to the fact, 



men of soiue species of Tabaiuis. this Without ha\ ing seen Hiugess' paper, 



liloom is of'ten produced b\ very in the following year. I noticed that the 



minute thin-walled hairs. Where ver\" striae upon the scales of the proboscis 



light colors, and white, whether- milk- of C?i/ex were on the outside, and so 



white or silver\-white, are jiresent in 



... . , -"Burgess, E. Contributions to llie anatomy of 



insects, the existence of an- beneath the j,,^ „,ilk-weed hutterBy, DanmS arckippn.-:. (Anniv. 



Cllticilla is tht" rule. mem. Bost. snc. nat. hist., iSSn.) Sejiarntc, p. rt, note; 



pi. I , fiy. O iintl 6«. 



