June, 'llj Gillette: aphidid.e 323 



fer(c during the summer months and the honeysuckles {Lonicera sp.) 

 during fall, winter and spring. 



Our specimens of pastinacce have been taken by Mr. Bragg as fol- 

 lows: From Heradeum lanatum October 27 and 28, 1908, and Novem- 

 ber 1, 1908; in all cases alate viviparous females and a few" winged 

 males were taken but no oviparous females. From honeysuckles 

 {Lonicera sp.) specimens were taken June 28, 1910, July 2, 1907, and 

 September 28, 1910, all viviparous females; specimens taken October 

 9, 1910, October 11, 1910, November 7, November 10 and November 

 12, 1910, all had males and oviparous females. 



The conclusions then are that these species of Rhopalosiphum have 

 several species of the Umbelliferae as summer host plants, that cap- 

 recB goes to the willows for the fall, winter and spring, that pastinacce 

 goes to the honeysuckles for the winter, that xylostei is probably a 

 synonym of pastinacm though I have no European material of this 

 species to study, that Koch's pastinacece, Monell's salicis, and Oest- 

 lunds archangelicce are all caprece. 



Descriptions of Rhopalosiphum caprece. Plate 9, Figures 10-16. 



Specimens from garden parsley, Petroselinum hortense, at Fort 

 Collins, Colo., November 1, 1910. 



Alate Viviparous Females. — Color of prothorax and entire abdomen green with 

 slight pulverulence beneath. Head, antennae, mesothorax above and below, meta- 

 thorax, tarsi, and distal ends of tibiae black; legs otherwise yellowish green as are 

 the cornicles and Cauda; anal plate dusky, cornicles and Cauda in some examples a 

 little dusky. The cornicles are .30 to .35 mm. in length, slender at base and enlarg- 

 ing at the middle to twice the basal diameter and somewhat constricted again near 

 the tip, which ends in a moderate flange; length of cauda, .10 mm.; above the Cauda 

 is a prominent tubercle from J^ to J^ the length of the Cauda (see Fig. 11). Length 

 of body 1.50 to 2 mm.; length of antenna 1 to 1.10 mm.; length of wing 2.60 mm. 

 Joints of antenna about as follows: III, .32-.37; IV, .13-.15; V, .12-.13; VI, .12-.13; 

 spur, .15-.17 mm.; joint III tuberculate with numerous sensoria. 



Apterous Viviparous Female. — General color pale greenish to very pale yellowish 

 with no dark parts but the eyes and tarsi. The striking peculiarity of this form is the 

 tubercle upon the Sth segment which is as long as the cauda and blunt at the apex 

 (see Fig. 12). Length of body 1.70 to 2 mm.; cornicle .40 mm. long, the club being 

 less abrupt than in the alate form. Antenna .80 mm. long; joints III, .20; IV, 10; 

 V, .10; VI, .10; spur, .13 mm. There are distinct antennal tubercles and the body 

 is remarkably smooth and free from hairs and on the dorsum the surface is minutely 

 punctate. 



The larva? and pupa? also show the tubercle well developed. 



Alate Male. — I have seen but one male. It was taken from parsley November 1, 

 1910, and differs from the alate viviparous female by being smaller, and by having a 

 larger number of sensoria on joint 3, about 7 on joint 4, about 7 on joint 5, and 4 on 

 the sides of joint 6. 



