Mar..i909] RoHWER : CrYTOCAMPUS IN BOREAL NORTH AMERICA. 13 



Female. — -Length 5 mm. ; length of anterior wing 5-5 mni. Head similar to 

 that of orbitalh Nort. Clypeus deeply, circularly emarginate ; lobes broad, obtuse, 

 middle fovea deep, strong, more sharply defined toward the clypeus. Antennal 

 foveae not large, or strongly defined. Ocellar basin not very strongly defined. Inter- 

 ocellar furrow broad, but visible ; lateral ocellar furrows broad and not quite reach- 

 ing the antennal fovea:. Third and fourth antennal equal or the third slightly longer ; 

 apical antennal joint longer than the preceding, not gradually tapering, but near the 

 apex obliquely truncated. Head closely, finely punctured, subopaque. Thorax above 

 subopaque; the middle furrow of the middle lobe of mesonotum more distinct than 

 usual, claws deeply cleft, inner tooth shorter than the outer, but not as short as the 

 inner tooth of coopeviC. Venation of anterior wings normal ; lower discal cell of hind 

 wings large and exceeding the upper on the outer margin ; stigma rounded on the 

 lower margin, tapering to apex, broadest in the middle. Sheath broad at base, 

 straight on upper margin, obtuse at the apex. Cerci equal to or longer than the upper 

 margin of the sheath. Black : head, except a black spot enclosing antennae and 

 behind, prothorax, tegulse, legs entirely, abdomen except at base above and sheath, 

 ferruginous Wings, clear hyaline, iridescent, venation pale brown, costa and stigma 

 pale yellowish, apical part of the stigma dusky. 



Habitat. — III. (Cresson and Norton, also Walsh), New York, 

 near New York City (Beutenmiiller), Colorado (Ashm.). 



The above description was drawn from a ? received from Dr. 

 Macgillivray. It is much darker than usual, being about the color of 

 the male. The following notes taken from Walsh's original descrip- 

 tion give the normal color of the female : Shining reddish ferruginous ; 

 a spot enclosing ocelli, middle part of mesonotum, base of scutellum, 

 metanotum, basal plates and part of the first dorsal abdominal seg- 

 ment black. Antennae bright ferruginous beneath, black at the base 

 above, brownish toward apex. I have not seen the male of this species, 

 but a good color description may be found in Norton's catalogue. 



The gall is an oval or roundish, sessile, lateral swelling, rising 

 gradually from the twig, not abrupt as in cooperce, etc. ; in color " pale 

 opaque brown" (Walsh), with irregular cracks and scales. Length 

 8-13 mm. Found on Salix cordata Muhl. Norton states that cer- 

 tain twigs v/ill be badly infested, having galls every few inches or half 

 inches even, while other twigs will be entirely free. 



"Larva pale yellowish, with a pale fuscous head and dark eye 

 spots ; removed from the gall it uses its legs freely " (Norton). 



Here again I must doubt Dr. Ashmead's record from Colorado. 

 It was probably founded on the gall as was Professor Cockerell's. In 

 working over the collection of the Colorado Agricultural College I 

 found no specimens of salicis-oviim, and feel sure that Mr. Weldon did 

 not have the galls of salicis-ovum, but rather cooperce or a closely allied 



