294 ENTOMOLOGICAL NEWS. [July, '09 



the fall, the influence of the particular color under which the 

 larvas and pupae were raised would be very suggestive of the 

 cause of the condition. 



Folsom* in discussing the replacement of red by vellow in 

 certain insects says, "These two colors in many butterflies and 

 beetles are due to pigments that are closely related to each 

 other chemically" and "Yellow in place of red then may be 

 attributed to an arrested development of pigment in the liv- 

 ing insect." Just what causes this arrest it seems is not very 

 well known, but Folsom gives a hint in this sentence, "These 

 changes of color are apparently of no use to the insect, being 

 merely incidental effects of light, temperature or other in- 

 organic influences." The light or color factor may therefore 

 have more influence than appears at present and further ex- 

 periments along this line should prove instructive one way or 

 the other. 



I believe that replacement of color in the Rhopalocera is of 

 very rare occurrence. This is the only example I have ever 

 seen out of many thousands of butterflies of my own and of 

 others collecting. In the work referred to above, Folsom men- 

 tions only one species of butterfly by name, "Vanessa (Pyra- 

 meis) atalanta," in which replacement occurs. 



Incidental Captures of Apterous and Orthopterous 

 Insects at Plana, Texas. 



BY E. S. TUCKER, Bureau of Entomology, U. S. Depart- 

 ment of Agriculture. 



A list of the orthopttrous insects collected by myself while 

 stationed at Piano, Collin County, Texas, from May to De- 

 cember, 1907, does not afford a proper indication of the num- 

 ber of species that might be expected to occur in the locality, 

 since only incidental attention could be given towards col- 

 lecting. However, as the common kinds were fairly repre- 

 sented in my collection, the species attract special interest 



*Entomology : With Special Reference to its Biological and Eco- 

 nomic Aspects, by Justus W. Folsom, pages 214-215. 



