December, '08] JorRXAL OF ECONOMIC entomology 363 



Adult Apterous Viviparous Female ^Plate 8, fig. 1. 



From specimens taken at Fort Collins, April 18, 1908. 



Color deep shining black with tibise, anterior femora and basal portion of 

 antennae beyond 2nd joint, pale dusky yellow: surface of body finely rugulose; 

 measurements vary little from the following: Body 1.90 mm. by 1.40 mm.; 

 antennae 1.25 mm.; cornicles .50 mm.; cauda short, conical, .17 mm. in length. 

 Joints of antennae: III, .36; IV, .21; V, .18; VI, .10; VII, .25 mm. The 

 cornicles taper a little towards tip and near the end are distinctly constricted 

 and turned outward and have a moderate flange at end. Body and an- 

 tenna without hairs, and the hairs on legs short and weak; no tubercles upon 

 thorax or abdomen, except in some specimens upon joint 7 of the abdomen, as 

 shown in colored figure. When at rest the cornicles usually converge strongly, 

 almost touching at their distal ends. Antennae upon distinct frontal tuber- 

 cles which are moderately swollen, as are the first antennal joints on the 

 inner side. 



Winged Viviparous Female. 



Described from siiecinieus taken at Fort Collins, September 28, 1907. 



General color deep black, with the tibiae and basal portions of the femora 

 pale yellowish in color; prothorax with slight lateral tubercles or none; 

 cornicles cylindrical, black, with moderate flange at distal end and varying 

 little from .37 mm. in length; cauda black, up-turned, tail-like, about as long 

 as hind tarsus; length of body varying little from 1.40 mm.; antenna a little 

 longer than body, averaging about 1.70 mm.; joints measure approximately 

 as follows: III, .50; IV, .31; V, .24; VI, .13; VII, .43 mm. Wings about 

 2.80 mm., stigma of wing blackish; venation normal; third joint of antenna 

 with about 14 moderately tuberculate sensoria in a broken row and none 

 upon joint 4. 



Winged Male. 



Specimens taken from sour cherry. College orchard. Fort Collins, Col., 

 November 17, 1907. 



Length 1.30 mm.; general color deep black, the abdoinen a little lighter 

 than the other portions of the body and in some specimens appears to be 

 dusky brown, with narrow transverse bands upon the segments between the 

 cornicles, and back of them it may be entirely black; eyes very dark red; 

 tarsi and distal portions of tibiae and femora black; prothorax with lateral 

 tubercles weak or lacking; wings hyaline, stigma a little dusky brown, nerv- 

 ures dark brown; length of antenna 1.70 mm.; joints of antenna: III, .40; 

 IV, .28; V, .23; VI, .11; VII, .50 mm.; length of wing 2.50 mm.; length of 

 cornicles .23 mm., cylindrical and black. Joints 3, 4 and 5 are strongly tuber- 

 culate, with a large number of similar circular sensoria. The sensoria are 

 most abundant on joint 3. Antennae on distinct frontal tubercles that are 

 slightly swollen, first joint distinctly gibbous. 



