Pomona Colleoe Joi'hnal of Entomoi.oov 



527 



Iwo-tliirds tlif length of tlif liody, articles I niul II color of lu-nd, III mid IV 

 liiiion yellow, the Jatter dusky at tij), remaining articles dusky, lengths: I, O.O/S 

 mm.; II, 0.01 iinn.; III. 0..)H mm.; IV', O.'i'i mm.; V. O.'i mm.; V'l, O.ii mm. (spur 

 0.'2<) mm.), total I.'.J8 mm. liotirum — I.iffht yellow, lirown at base with dark tip. 

 reaching to third coxic. Prolhoras — With lateral tubercle, deep lirowii. Mrio- 

 thorax — ,Sanie color as the prothorax. Mrlnthoraj- — .Much ligliter in color, auilH-r. 

 .//u/oiaen ~ Pale jjreen with dark transverse dorsal markitigs, lateral dark 

 marginal markings on ventral surface, small tubercle on lateral margin near 

 middle. Cornicles — (Figure 170 C). Cylindrical, black, curved outwardly, slightly 

 wilier at base than at apex, length O.V't mm. /-P^'-t — C'oxic brown; femora of two 

 tirsf pairs yellow, with dusky tips, apic/il two-thirds of third pair dusky; tibisp 

 (lark at extreme bases and tips; tarsi dark. Slyh- — Half as long as cornicles and 

 as long as tarsi, dark. 



llnsi — On the undersides of tin- older leaves of Craniithus hirsutus Nutt. 

 I'sually .scattering and not in thick colonies. 



Locality — Santa Paula Canyon, in mountains near Santa Paula, Cal., at an 

 •iltitude of from 700 to 1.500 feet. Date of collection — A])ril '29. 1<HI. .Serial 

 number ."^'2. 



This form was first belii-ved to be Aphis ccanolhi Clarke, but according to his 

 origin.'il description in Canadian F.ntomologist XXX\'. p. •2.'>(). li)0.'1, the following 

 differences are noticeable and appear to justify separation: 



Aphis ceanothi CLirke 



General- Winged form larger th.in 

 apterous. 



Winded — .Vntennal articles IV and V 

 sub equal. 



Cauda inconspicuous and yellow- 

 brown. 



Abdomen clouded yellow-brown. 



Veins dark green. 



.Jpfprou*— Antennal articles IV and 

 \' sub-equal. 



Legs and antenna- of a unifiirni color. 



Body globular. 



Hosts — Infesting tender ti]>s and on 

 blossoms of Cranolhus iiiteirerrimus. 



Aphis ceanothi-hirsuti n. sp. 



Apterous form much the largest. 



Antennal article IV slightly longer 

 than V. 



Cauda plainly visible and dusky. 



.Vbdouien with distinct dark dorsal 

 ni.'irkings and black posteriorly. 



Vfins yellow and dusky. 



.\rticle I\' longer than V. 



Legs and antenna- not of a uniform 

 color. 



Hody elongated to globular. 



On older leaves of Ceanothiis hirsutus 

 N'ult. Never found on blossoms, al- 

 tlidugli tliiTe wiri' plitity on the trees. 



Aphis medicaginis Kcich. 



18.'>7 Aphis medicapinis Koch, Pflz., p. 94 



1879 Aphis medicaginis Koch, Monell, L'. .S. Geol. .Surv. V, No. I, p. H. 



1880 Aphis medicaginis Koch, Thomas, 8th. Rept. Ent. 111., pp. 101 , 192. 

 1910 Aphis medicaginis Koch, Williams, Aphid. Nebr., pp. 50-51. 



