440 ENTOMOi.or.rcAL NKws. [Dec, 'it 



A new Genus and four new Species of Aphidtdae 



(Rhynch.). 



By C. P. Gillette, Colorado State Agricultural College, 



Fort Collins, Colo. 



(Plate XVL) 

 ATARSOS n. gen. 



Lice in all stages without tarsi ; a small pulvillus-like pad on 

 the distal end of each tibia ; moderately hairy, the hairs being 

 capitate in all stages ; cornicles short, tapering ; antennae in all 

 adults much shorter than the body and with numerous sensoria 

 on joints 3, 4 and 5. and with spur little longer than the joint 

 bearing it. 



Type: Atarsos grindeliae, n. sp. 



Through the kindness of Mr. J. T. Monell, I have been able 

 to examine mounted specimens, alate and pupae, of Mastopoda 

 pteridis Oest. Striking characters are the 6-jointed antenna 

 with the very long third and short fifth joints, the very long 

 filament, the long cornicles convex on the free end without 

 flange, and the vestigeal tarsi on all legs. 



Atarsos grindeliae n. sp. (Plate XVI, Figs. 1-6.) 



Described from specimens taken on leaves of Grindelia 

 squarrosa, at Fort Collins, Colo., May 23, 191 1. 



Alate Viviparous Female. — Color of abdomen dull or dusky green; 

 head, thorax above and below, distal ends of femora, tibiae and anten- 

 nae black or blackish ; eyes very dark red ; on the dorsum are numer- 

 ous broken transverse dusky dashes, and lateral spots. Length of body 

 1.60 to 2 mm.; antenna i.io mm.; joint 3 about equaling joints 4, 5 and 

 6 together (occasionally joints 3 and 4 are connate) ; joints 3, 4 and 

 5 with tuberculate sensoria about as follows: III, .40; IV, .18; V, .13: 

 VI, .09; spur, .13 mm; terminal joints very scabrous; venation normal, 

 the veins rather heavy and dusky ; cornicles stout, cylindrical, sharply 

 constricted close to the rather broad flange, .15 mm. in length; cauda 

 short, broad at base and tapering to a moderately acute apex ; all 

 tibiae ending in a light pad, depressed at the center and protruding on 

 the ventral surface and entirely without tarsi ; hairs on all parts, except 

 the cauda, capitate. 



Apterous Viviparous Female. — Pale shining green in color, with 

 antennae, at least in distal half, distal ends of tibiae and cornicles 

 dusky to blackish ; eyes red ; cornicles distinctly stouter at base than 



