1913] Pemphigince Attacking Populus In Colorado. 



491 



The specimens of this species in the collection have been 

 taken as follows. 



FUNDATRIX. 



Manitou, Colo., 6-25-13 



Colorado Springs, Colo. 6-25-13 



Populus angustifolia 



C. P. Gillette 

 C. P. Gillette 



Horsetooth Mountain 

 Spreckles, Cal. 

 Fort Collins, Colo. 

 Fort Collins, Colo. 

 Vanderbilt, Mich 

 Boulder, Colo. 

 Sacramento, Cal. 

 Horsetooth Mountain 

 Boulder, Colo. 

 Manitou, Colo. 

 Boulder, Colo. 

 Manitou, Colo. 



Manitou, Colo. 

 Manitou, Colo. 

 Big Thompson Canon 

 Boulder, Colo. 

 Manitou, Colo. 



Manitou, Colo. 



FUNDATRIGENIA 



8-8-09 

 7-27-13 

 8-11-12 

 8-11-13 



8-14-12 



8-1-13 



7-19-09 



8-25-12 



8-9-13 



8-31-13 



10-18-13 



8-9-13 



10-20-08 



9-18-10 



8-31-13 



10-18-13 



Populus angustifolia M. A. Palmer 

 " fremontei (?) A. C. Maxson 

 " angustifolia L. C. Bragg 



candicans 



fremontei 

 angustifolia 



R. L. Pettit 

 L. C. Bragg 

 E. Bethel 

 M. A. Palmer 

 L. C. Bragg 

 C. P. Gillette 

 L. C. Bragg 

 G. M. List 



Sexupara. 



Populus angustifolia C. P. Gillette 



Sexuales. 

 10-18-13 Populus angustifolia 



L. C. Bragg 

 George M. List 



George M. List. 



Comaphis, New Genus. 



The genus is closely related to Asiphum Koch. The wax plates 

 are absent in the fundatrix but are present in the apterous fundatrigenia; 

 the antenna of fundatrix, 5-jointed; of fundatrigenia, 6-jointed; per- 

 manent sensoria ciliated. In the type specimens the cubitus is simple, 

 and the fundatrix, fundatrigenia and sexupara all develop in a gall 

 together. 



Cornaphis populi, New Species. 



Producing galls on leaves of Populus angustifolia, which 

 are merely a thickened and extended portion of the margin of 

 the leaf which folds upon the upper surface producing a moon 

 shaped, pod-like gall of a paler green color than the surrounding 

 foliage, and often streaked with red. Galls usually measure 

 from 15 to 18 mm. in length, and are about one-third as thick 

 as the extreme length (figures 11 and 12). 



I have never seen more than one of these galls on a single leaf, 

 apparently each gall develops three generations of lice within 

 it, the fundatrix and the fundatrigenia which are apterous, and 

 the sexupara which is alate. 



