30 BULLETIN UNITED STATES GEOLOGICAL SURVEY. [rol V. 



npical joint miicli longer than the preceding. Nectaries yellowish, short. Apierous 

 individuals : With capitate hairs, which disappear when the insect acquires wings ; ab- 

 domen somewhat tubercular. Winged individuals : Wings blotched w^ith dusky or dusky 

 brown ; an irregular broad band running from the apex of the second discoidal to the 

 apex of the upper forklet, and another runniug from the apex of the first discoidal 

 towards the base of the cubitus, but becoming obsolete before reaching that point. 

 Stigma short, abruxitly tapered at ai^ex. Distance between the tips of the tirst and 

 second discoidals one-half that between the tip of the second discoidal and the lower 

 cubital branch. Distance between the base of the cubitus and the base of the stigmal 

 A'ein nearly equal to the distance between the apices of the lower forklet and the lower 

 branch of the cubitus. Length 1.27—1.52"'"^ ; to tip of wings 2.54™«=. 



May — August. 



Yery common at Saint Louis on Ascl6])ias cornnti and A. obtusifoUa. 

 This is the first species belonging to tliis genus wliicli lias been found 

 on a herbaceous plant. 



Callipterus DISCOLOR, n. sp. — Winged form: Abdomen greenish or yellowish, with 

 four rows of irregular brownish sjiots, often Avith smaller dots between them, the two 

 middle rows becoming confluent just above the nectaries. Antenuai with the sixth 

 joint less than the seventh. Wings with irregular dusky bands arranged similarly to 

 those in C. asclepiadis. Length 1.77""" ; to tip of wings S.SO'"™. 



Under side of leaves of Quercus hicolor. Saint Louis, Mo., May. 



Callipterus punctata, n. sp. — Winged form: General color pale yellow; abdomen 

 with faint dusky shadings, representing the dots of the ]ireceding species. Sixth joint 

 of the anteiTUse much less than the seventh. Wings hyaline, except dusky markings 

 at the tips of the second discoidal, ciibital, and stigmal vein, and a dusky mark at base 

 of stigmal vein. Length 1.52—1.77""" ; to tip of Avings 3.04— 3.29'"'". 



On the under side of leaves of Quercus hicolor. May — June, Saint 

 Louis, Mo. It is possible that this is merely a variety of C. discolor^ but 

 I have never succeeded in finding intermediate forms. 



Callipterus i-iyalinus, n. sp. — Winged form: General color pale yellowish. Apter- 

 ous individuals with the usual cai^itate hairs. Seventh joint of the antennae longer 

 than the preceding. Wings hyaline, without any marlcings, or with a scarcely percepti- 

 ble shading at the tips of the wings. Stigma rather long, the distance between the 

 base of the stigmal vein and the base of the cubitus being much greater than that be- 

 tween the tips of the lower forklet and lower cubital branch. Basal tAvo-thirds of the 

 stigmal vein subhyaline. Second discoidal not so much curAxd as m C. puneiata. 

 Length 1.77—2.02""" ; to tip of Avings 3.04""". 



On the under side of leaves of Quercus imhricaria, to which species I 

 believe it is confined. May — June, Saint Louis, Mo. 



Callipterus BETULiECOLEJsrs, n. sp. Aj^his hetulwcolensf, Fitch, N. Y. Catl. Horn, 

 p. 66. — Winged individuals: General color j^ellow ; antennae, first and second joints 

 entirely yellow, the apical half of the remaining joints more or less dusky. Dorsum 

 uniform yelloAv, without tubercles ; wings hyaline ; costal and subcostal \^eins whitish ; 

 first and second discoidals black. Stigma yellowish ; basal two-thirds of the stigmal 

 A'ein obsolete ; apical portion hyaline, subobsolete. Nectaries yellow, a little' fuscous, 

 fully as long as the tarsi. The rostrum barely reaches the middle coxae. Length 

 2.021"'" ; to tip of wings 3.81'"™. 



On the under side of Birch leaves. June, Saint Louis, Mo. 



Dr. Fitch's description of A. hetulcecolens is not sufficiently exact to 



