KELLOGG: TAXOXO^IIC VALUE OF SCALES OF LEPIDOPXERA. tic, 



Frenatfe." I have, in fact, been able to study so far only a few fami- 

 lies, some few notes on one of which, the Lasiocampidae, are presented 

 herewith. It is my hope to continue the study of these scale- condi- 

 tions in the light of their taxonomic value. In this study it will be 

 desirable to endeavor to recognize the different lines of development 

 follovved by the scales of the various families, and the different 

 degrees of scale-specialization shown by the various members of eacli 

 family. I believe some characters of interest and value can be 

 derived from such a study. 



Family l.asiocampida' (fig. 12, p. 66; and figs 30-32, Plate X). The 

 family includes, according to Comstock, the North American genera 

 Clisocampa, Artace, Tolype, Heteropacha, Gastropaclia, Glovcria, lliaii- 

 w<; and Qiiadrina. I have been able to examine specimens of all these 

 genera, including the rare Qiuulrina, the only known specimen of 

 which (Q. (liazo/na), taken by Prof. F. H. Snow, is now in the collec- 

 tion of the University of Kansas. The typical specialized scale in 

 this family is especially characterized by its many long, acute fingers 

 or teeth (see figs. 30, 31, 32, Plate X). These fingers vary in length, 

 compared with the whole length of the scale (from tip of pedicel to 

 tip of middle finger) from one-third of this length, or even less as in 

 Clisocampa, to two-thirds or more as in Tolype. The scales of 

 Clisocampa depart most wiilely from the typical scale of the family in 

 the shortness and small number of the fingers, three being the 

 common number of fingers. 



The line of development has been described for Glovcria arizo- 

 iiciisis (see p. 65), and is illustrated for this species in figure 12. 

 The arrangement of the scales in rows is fairly apparent but there is 

 no such regularity and tiered arrangement as presented by the more 

 specialized Frenati>3 (see figs. 33 and 34, Plate X). 



I desire to thank Prof. John Henry Comstock, Anna Botsford 

 Comstock and Mary Wellman for favors rendered in connection with 

 the preparation of this paper. 



Note. — I am acquainted with tlie papers on Lepldoptera scales by Kettelhoib (Ueber 

 die Schuppen d.'i- S^•lllu;^ttel•IiIlgsflueg^3L Colniar. IS8I, first printed in Latin as a disser- 

 tation in KS.)'.n; ami Schneider (Die Scliuppen an den verse tiiedeneu Fliiegel- and Koer- 

 perteilen der Lupidopteren. Zeitsehr. f. d. ges. Naturw. Bd. LI, 1878). Kettelhoifs paper 

 is of special interest. 



