Po.MO.N A ('<)l,I.K(iK .lolHNAI. OK K.NTOMOLOOY 525 



of articles: I. (l.(t}> iiiiii. ; II, O.D" iiiiii. ; III, ().;". nun.; IV, i).-Z mm.; V. O.iy mm.; 

 VI, 0.48 mm. (spur O.SCi mm.), total L.'i.S mm. Uostrum — Ri-nchin)( just l)cyond 

 first coxa-, dusky. Prothorax — Dark fxcept basal margins which arc lighter. 

 MesD- and Metathoras — Each with four small black spots on dorsum. Ahdomen — 

 With transverse dark markinf^s and dark spots on the dorsum, segmentation 

 ob.scure dorsally and distinct ventrally. genital plate dusky. Coruiclrs — ( Figure Kiy 

 K). Cylindrical, slightly wider at base, short, black, length 0.17 unit. I-^gt — 

 Normal, dusky, coxa- color of body; femurs darker at apices; tibiie dark at ba.ses 

 and tips; tarsi dark. Sti/le — (Figure Kiy CJ). Triangul;ir or conical in shape, 

 dark; length 0.1" mm., width at base 0. 1.'j mm. 



//««/.? Occurs in great numbers upon C'abbagi- and CauliHower {lirattira 

 olrracea I..), Wild Mustard (li. ram pest ris I,.), Hlack Mustard {li. nigra Koch.), 

 Wild Radish {liapliaiius salivus I..). 



Locality Throughout the entire st;itc. Date of collection — Nov. '2. lyiO. 

 Serial number 8. 



This insect often does considerable dam.'ige to c.ibbage. caulitlowrr and other 

 cruciferous plants in the g;irdiii. It collects in great colonies aiul may completely 

 cover the host. It is partially controlled by natural enemies, the predaceous ones 

 being Uippodamia convcrgrns (iuer., Cocrhiflla californica, Ilippodamia maculala 

 DeCi.. and the larva- of the Syr])hid flies. The internal |>arasite, Diarrctus califor- 

 nifiix Baker, does good work in the southern part of the state. 



It may be controlled artificially by spraying with Kerosene Emulsion, Whale- 

 oil soap. Tobacco decoction, or Carbolic .Vcid Emulsion. 



Aphis ceanothi-hirsuti n. sj). 



WINOEI) VIVIPAROIS FEMALE ( FigUrc 170 A) 



Length of body I . tS nun., width of mesothorax (>.() nun., wing expansion 

 6.8 mm. 



Prevailing color — \'ery dark brown to almost black. Head — As wide ai 

 prothorax, black. Ei/ea — W'ry dark red. Antennae — (F'igurc 170 a). Dusky 

 throughout, reachingi nearly to base of cornicles, very sparsely haired, lengths of 

 articles: I. 0.0(5 mm.; II. 0.0(5 mm.; III. 0..S8 mm.; IV, 0.22 mm.; V, 0.2 mm.; VI, 

 0.41 mm. (spur 0..S nun.) ; a large number (iy-2.S) circular sensoria on III. Rottrum 

 — Reaches just to metathorax, light yellow, brown at base and dusky at tip. Pro- 

 thoraj- — Black, with distinct lateral tubercles. Mesothorax — Black with well 

 developed muscular lobes. Metathorax — Dusky, but not as dark as mesothorax. 

 \'entral surface of thorax very dark brown or black. Ahdomen — Dark ambrr 

 brown, with marginal and transverse dark markings, all black behind a transverse 

 line drawn across abdomen in front of the cornicles one-quarter the distance from 

 the base of the cornicles to the base of the abdomen. This seems to be character- 

 istic. Ventral surface dusky or dark brown. Cornicles — (Figure 170 b). Cylindrical, 

 straight, black; length 0..S mm. Legs — Normal, coxa- black, femora of prothoracic 

 legs amber with tips only dusky; femora of nie.so- and metathoracic legs amber at 

 base and remainder dusky; tiba? of all legs dark at extreme base and the tips; tarsi 

 dark. If'ings — Hyaline. Primary — Length .'!.2 mm., width l.I mm.; costal vein 



