40 



I 



at the tops of the legs are shown ; and at /, forms of the scales which are distributed over 

 the wings and body. 



For the above figures, as also for those of 12, 15, 16 and 17, we are indebted t) the 

 kindness of Prof. J. A. Lintner, of Albany; 12, 13, 14 and 15 are from drawings made 

 by Prof. C. Y. Riley ; 16 and 17 from drawings by Prof. J. H. Comstock. 



NuMBHR OF Broods. 



There are certainly two and probably three broods in a season in the State cf New 

 York ; flies of the first brood make their appearance in the latter part of May, ani larvae 

 may be found full-grown in the clover heads early in J uly ; during August the lies are 

 again on the ^ving, and the next crop of larvfe are full-grown in September. Ii Wash- 

 ington three broods have been observed in the season ; the f uU-gTO-wn larvae of the first 

 brood enter the ground by the 23rd of May, flies issuing from these early in Jum, which 

 laid eggs from which larvae matured, and flies again appeared in September. The flies of 

 the later brood begin to issue in September, and continue to escape all through the mild 

 autumn weather, and some remain in the chrysalis state until the following spring. Trom 

 earth taken from the surface of an infested clover-field, and kept in a warm room the 

 flies have been found to escape throughout the winter. 



Localities Affected. 



This troublesome pest is now very generally distributed over the State of New lork, 

 and has lately been observed in Yermont ; it has also been found in the distrit of 

 Columbia and across the river in Yirginia, where the clover crops have sufi'ered 'rom 

 this cause ; it has also been found in Pennsylvania. Although not yet reported rom 



