114 WM. G. DIETZ, M.D. 



DKYOFE Cham. 



^Ir. Chambers (Can. Ent., Vol. VI, p. 50) characterizes this 

 genus as follows: "Primaries hinceohite, the costa enters the margin 

 about the middle, discal cell narrow and closed by a nearly straiglit 

 discal nervure. The subcostal sends off a long curved branch from 

 about its middle, and which attains the margin behind the end of 

 the cell. From the end of the cell the subcostal bends somewhat 

 obliquely upwards to*the costal margin. The median is furcate 

 from the end of the cell, both branches being short and bending 

 somewhat suddenly downwards to the dorsal margin, the inner 

 branch being straight and continuous with the discal vein. The 

 discal vein emits fiv^e branches, the superior going to the costal mar- 

 gin, the next furcate before the tip, with one of the branches to 

 each margin ; the three others go to the dorsal margin. Secondaries 

 nari'owly lanceolate, costal vein short, subcostal very long, simple, 

 attaining the costal margin near the tij) ; cell unclosed ; median 

 vein with three nearly equidistant branches. No discal vein, but 

 an independent branch which arises near the median and attains 

 the dorsal margin before the apex." 



The other characters given are those of the group, except the 

 labial palpi, which he correctly describes as " short, porrected, 

 densely scaled, almost tufted beneath," and to which I have only to 

 add that these organs are about equally developed in both sexes. 

 Mr. Chamber's statement " the discal vein (fore wing) emits five 

 branches, the superior going to the costal margin, the next furcate 

 before the tip, with one of the branches to each margin, etc., is not 

 correct, the lower branch (vein 7) goes to the tip. Cell of hind 

 wing closed between veins 6 and 7 



In some males the tufting of the second palpal joints projects 

 beyond its apex beneath and in conjunction with the shorter, slen- 

 der, terminal one, gives the palpi a somewhat bifid appearance. In 

 the female the terminal joint is shorter, cone shaped and slightly 

 depressed or drooping. The face is rather strongly retracted, 

 smooth scaled, the scales never spreading but rather concurrent to a 

 point above the base of the tongue. Head closely appressed to the 

 thorax. 



The species resemble each other closely with few exceptions. The 

 basal space, well defined, extends to one- third or two-fifths the wing 

 length, and generally limited by a fascia, which may be entire or 

 merely indicated by a costal or dorsal patch, more rarely entirely 

 obsolete. 



