130 THE ENTOMOLOGIST. 



Edw. Mr. W. H. Edwards has recently described the larva from 

 specimens obtained from eggs laid b}'^ a female captured by Mr. 

 W. S. Foster on Marshall Pass, Colorado. The larvse are darker 

 than those of any other Colias known to Mr. Edwards. 2. Recent 

 observations and records have tended to confirm the view that 

 melanism, or at least one form of it, is due to dampness. 

 Conversely, pallid forms occur predominantly in the arid districts 

 of Western North America, and I believe also in similar districts 

 in Asia. With regard to the small mammal Spermophilus tri- 

 decemlineatus pallidus, it " is the subspecies characteristic of the 

 plains, and its pallid colour, like that of numerous mammals and 

 birds of the same region (of Western N. America), is due to the 

 aridness of the area whicli they inhabit" (Dr. C. H. Merriam, 

 in litt. to H. G. Smith, jun.). 



For the present paper, this shall sufi&ce for colour-variation. 

 It now remains to treat of varieties of shape and size, and of 

 certain other matters, such as hybridism. 



Ekrata. — P. 4, line 9 from bottom, for "typica" read '' chrysographa, 

 Hb." P. 6, line "25 from bottom, for " formally " read " formerly." P. 55, 

 line 11 from top, for "obscura" read " salicis, Staiut." P. 55, line 13 from 

 top, for " nigresceiis " read " ia/uscata, Wliite." 



(To be continued.) 



LIST OF THE BRITISH STRATIOMYID^, WITH 



ANALYTICAL TABLES AND NOTES. 



By E. Brunetti. 



(Concluded from p. 86.) 



6. Odontomyia, Mg. (1804), Klass. i. 138. 



= Stratiomys, p. Zett. 



A. First antennal joint twice as long as 2nd. 



B. Abdomen with whitish pubescence . - - . argentata. 



BB. Pubescence absent. microleon. 



AA. First antennal joint as long as 2nd. 



C. Abdomen all black tigrina. 



CC. Abdomen yellow or green, marked with black 



D. "With 3 pairs of distinct spots ornata. 



DC Yellow or gi-een, with black dorsal stripe ; no distinct spots. 



E. First vein irom the discoidal cell rudimentary, 3rd complete 



viridida. 

 EE. First vein complete, 3rd rudimentary. 



F. Black abdominal baud narrower on 1st segment than the others. 



hgdropota. 

 FF. Black abdominal band of equal width on all segments. angulata. 



1. 0. microleon, L. (1761), F. Suec. ii. 1781. — Four distinct 

 species have come under my notice as ^'microleon." One in the 

 Entomological Club collection was O. ornata var. ; one in 



