REPORT OF THE STATE ENTOMOLOGIST I913 I43 



clothed with long, stout setae ; terminal segment narrowly oval. 

 Palpi ; first segment slender, slightly incrassate, the second a little 

 longer, stouter, the third longer than the second, more slender, the 

 fourth a little longer than the third, slightly dilated. Mesonotum 

 dark brown, the narrow submedian lines indistinct. Scutellum 

 dark brown wnth sparse apical setae, postscutellum yellowish brown. 

 Abdomen with the basal and terminal segments fuscous yellowish, 

 the intermediate ones dark brown. Wings hyaline, vestiture sparse. 

 Halteres orange yellow basally, whitish apically. Coxae pale yel- 

 lowish, femora pale yellowish basally, fuscous apically ; tibiae and 

 tarsi a nearly uniform dark brown ; claws slender, strongly curved, 

 the pulvilli shorter than the claws. Genitalia ; basal clasp segment 

 long, stout ; terminal clasp segment swollen basally ; dorsal plate 

 long, deeply and narrowly incised ; ventral plate long, tapering to 

 a narrowly rounded apex. Type Cecid. 445. 



Dasyneura trifolii Loew 

 Clover leaf midge 



1874 Loew, F. Vehr. z.-b. Ges. Wien, 24:143 



1880 Comstock, J. H. U. S. Comm. of Agric. Rep't, p. 197-99 



1881 Lintner, J. A. N. Y. State Agric. Soc. 40th Rep't, p. 24-25 

 1894 Comstock, J. H. Manual for the Study of Insects, p. 446 

 1901 Howard, L. O. Insect Book, p. 113 



1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 344 



1909 Folsom, J. W. 111. Agric. Exp't Sta. Bui. 134, p. 171-75 



This European species was first recognized in America by Prof. 

 J. H. Comstock in 1879. White clover was observed in the middle 

 of June to be infested with Cecidomyiid larvae, the affected 

 leaves being closely folded together upon the midrib so that the 

 upper side of each half of the leaflet was apposed, there being from 

 one to twenty whitish or pale orange maggots in the shelter thus 

 formed. The under surface of infested leaves has a sickly appear- 

 ance, being yellowish or brownish. This species is of comparatively 

 slightly economic importance in this country, since its attacks appear 

 to be confined largely to white clover, Trifolium repens, 

 though in Europe it is said to affect the lower root leaves of red 

 clover, Trifolium pratense. Doctor Folsom states that 

 he has been unable to find this midge upon red clover in Illinois. 



Life history. The following summarized account was taken 

 largely from Doctor Folsom's discussion of this species. The pod- 

 like galls formed by the adherent discolored halves of clover leaf- 

 lets are common on white clover throughout the growing season, 

 since the species breeds almost continuously during this entire 

 period. Several stages in the development of the insect may be 

 represented at the same time in one gall. Even larvae coming from 



