November — December iSSS.] 



PSYCHE. 



131 



Green at first, becoming black by ex- 

 posure. Deposited on bark, in and 

 about the axils of buds and small 

 branches. 



- Described from many specimens on 

 Cornus sericea, 24 October 1887. 



Callipterus discolor. Monell. 



This handsome species was described 

 by Mr. Monell, in 1S79, from winged 

 specimens found in Missouri, on the 

 under side of the leaves of ^uercus 

 bicolor., in May. So fiir as I know it 

 has not since been treated of. 



I first noticed the species about the 

 middle of October, when winged vivi- 

 parous females were establishing colo- 

 nies of sexed individuals on the under 

 surface of the leaves of the bur-oak 

 (^^nercus macrocarpa Mx.) on the 

 university farm. I was unable to de- 

 scribe this form at once, and when I 

 next visited the trees, 28 October, only 

 the sexed individuals were present. 



As noted below, tlie eggs are depos- 

 ited on the leaves, and very likely the 

 young hatch in spring and crawl upon 

 the twigs before the leaves fall, as it is 

 well known that many oak leaves, 

 especially on }'oung trees, do not drop 

 until quite late in spring. 



Winged 7?iale. 



Expanse of wings ...... 2.60 mm. 



Width of body (across prothorax) 0.45 mm. 

 Width of body ( " mesothorax) 0.65 mm. 



Length of body 2.00 mm. 



Length of antennae 1.35 mm. 



Light yellow, with black markings. 

 Head above subtriangular, black. Pro- 



notuni black, with an oblique yellow- 

 ish line on each side near the margin, 

 and a transverse line (interrupted by 

 two black spots) on the posterior mar- 

 gin. Meso- and metanotum, black, 

 with a yellow stripe on each mar- 

 gin. Dorsum of abdomen, yellow, 

 with a series of transverse dark stripes 

 along the middle, a row of dark spots 

 on each lateral margin, and numerous 

 smaller scattered spots on its surface. 

 Ventral surface of head dusky green ; 

 of prothorax, yellowish ; of meso- and 

 metathorax, dark green ; of abdomen, 

 yellowish, with transverse dark stripes, 

 especially towards anus. E3'es red. 

 Rostrum reaching slightly caudad of 

 caudal margin of anterior coxae ; green- 

 ish-yellow with base dusky. Legs 

 yellowish, more or less dusk}', with fine 

 hairs. Antennae dusky brown or 

 black, darker apicallj', long and taper- 

 ing. Joints I and II subequal in 

 length, I being larger transversely; III 

 long ; IV two-thirds as long as III ; V 

 slightly shorter than IV ; VI and VII 

 subequal, both shorter than V; VII 

 slender. Membrane of wing, whitish. 

 Tegulae and basal portion of veins, yel- 

 lowish. Wing-veins brownish black, 

 with more or less clouding of the mem- 

 brane along their margins, especially 

 where they terminate. Stigma wide, 

 dusk}' at lateral and caudal margins, 

 but whitish in middle and front. 



Described from three living speci- 

 mens taken on under leaf-surface of 

 ^i/ercus macrocarpa., 29 October 

 1S87. 



