322 JOHN B. SMITH. 



The imagos fly in the Ural and Altai regions in the evening at 

 flowers. 



There are but four European species, and the genus there seems a 

 compact one. To include our species the definition will have to be 

 somewhat extended, since there are numerous species showing several 

 different types of maculation and considerable difference in habitus. 

 Essentially the structural portion of the definition applies well 

 enough to our species. In some, however, the eyes are not very 

 distinctly lashed, and in a very fair proportion there is a distinct, 

 though never prominent posterior tuft to the thorax. There is some 

 little difference in wing form as well, making the genus a somewhat 

 loose assemblage, or a series of poorly limited groups which are 

 themselves rather comj)act. 



The essential characters are the armed fore tibia, lack of other 

 tibial armature, the more or less evidently lashed eyes, unmodified 

 front and rather smooth vestiture. 



The genitalia of the males, so far as they have been studied, are 

 of the same type. To Lederer's characters, which in general apply 

 to our own species as well, may be added that from the lower margin 

 of the harpe, and about its jniddle arises a corneous clasper some- 

 what variable in length and form, but rarely much curved and very 

 rarely reaching beyond the upper margin of the harpe. 



The first series of species, which in structure and habitus perhaps 

 is nearest to the European, is readily distinguished by yellow secon- 

 daries, the margin broadly l)lack. Three species are referable here. 

 The second has the secondaries banded, white and black, and is 

 readily recognizable by that character alone. The species are some- 

 what broader winged than usual. The other species have the secon- 

 daries white or fuscous, with a more or less definite outer dark mar- 

 gin, variable also in width. 



Separated very distinctly from the others is atrlfasciata, which is 

 unique by the broad, black, contrasting, median space of primaries. 

 The secondaries are black, white basally, black beyond the middle. 

 It is more robust in apjjearance than the preceding, the collar is 

 somewhat marked medially and the thoracic tufting is evident. The 

 genus Metahadena was created by Mr. Morrison for this species, but 

 Mr. Grote properly suppressed it. 



The remaining species form two distinct series — in the one the 

 normal maculation is present — in the other the median lines are lost. 



