ALBEET F. SWAIX 21 



It is described herewith as a new species, naming it after its host 

 plant, Cupressus spp. Cotype specimens are in the writer's 

 private collection under the serial numbers AFS 36-16 and 

 AFS 2-17 and in the collection of the University of California 

 under the serial number AF>S 2-17. 



Alate viviparous female. — Prevailing color dark green and black. Head 

 and thorax very dark green to black. Antennal segments I and II concolor- 

 ous with the head, III green with dusky apex, IV, V, and spur dusky. Beak 

 green with apex dusky. Wings normal with grayish veins and grayish-green 

 stigma. The coxae are dusky, femora green with the apical one-half of the 

 hind pair in some specimens darker green, and in other specimens with all 

 three pairs green with apices only darker, tibiae green with apices dusky, tarsi 

 dusky. Cauda and anal plates dark green. 



Head (fig. 8) rectangular, front flat, no antennal tubercles. Antennae (fig. 

 13) short, scarcely reaching to the base of the abdomen, five-segmented. 

 Segment III and V are subequal, or III slightly longer. This character takes 

 this species out of the genus Sipha, and places it more nearly into Cerosipha 

 in which III and V are subequal (see note 11, pages 19 and 20). In two 

 antennae examined V was slightlj' longer than III, but in all other cases 

 HI was either equal to or slightly longer than V. The base and spur of V 

 are subequal, or the spur a little longer. Segment IV is equal to or some- 

 what longer than the base of V. On V are present the usual primary 

 sensorium and the small accessory sensoria. On IV there is always one 

 sensorium at the apex (primary sensorium?) and from one to three second- 

 ary sensoria located in the apical one-half. Usually there is but one 

 which is located about the middle of the segment. On III there are from 

 five to eight (usually six) fairly large, circular, secondary sensoria, arranged 

 in an even line from base to apex. From the sensoriation it would api)ear 

 that segments IV and V correspond to V and VI of the tyi)ical Aijhitlitl 

 antennae, while III corresponds to III and IV. The Vjeak is short, reaching 

 only to the second coxae. The prothorax and abdomen are without lateral 

 tubercles, in so far as could be determined from the specimens on hand. 

 The wings (fig. 9) are normal, with normal Aphidine venation. The second 

 l)ranch of the third discoidal is nearer to the tip of the wing than to the base 

 of the first branch, somewhat as in Aphis avenae Fabr. and Aphis salicicola 

 Thomas, although perhaps not quite so marked. The cauda (fig. 39) is long, 

 ensiform, and quite conspicuous, being slightly more than one-eighth the 

 length of the body, and one-half as long again as the hind tarsi. The cor- 

 nicles are atrophied, being merely pores, and very hard to distinguish. In 

 most of the writer's material it is impossiljle to see them, but in a few speci- 

 mens, mounted on the side and cleared consideralily, the pores can be made 

 out. 



Measurements: Body length, .986-1.275 mm. (ave. 1.122 mm.): width of 

 thorax, .561-. 629 mm. (ave. .578 mm.): antennae total, .493-646 mm. (ave. 

 .583 mm.); Ill, .153-.238 mm. (ave. .204 mm.); IV, .085-127 mm. (ave. .109 

 mm.); V, .187-204 mm. (ave. .197 mm.): cauda, .144-. 170 mm. (ave. .158 mm.): 



TRANS. AM. ENT. SOC, XLIV. 



