150 MISCELLANEOUS STUDIES 



44. Genus Mindarus Koch 

 Koch, Die Pflanzenlause, p. 277, 1857. Type M. abietinus n.sp. 



176. Mindarus abietinus Koch 



Koch, Die Pflanzenlause, p. 278, 1857 (orig. desc.). 



Clarke, Can. Ent., vol. 35, p. 248, 1903. Scliizoneura panwola Thos. (list). 



Patch, Maine Agr. F.xp. Sta., Bull. 182, p. 242, 1910 (desc.). 



Eecords. Pinu-s radiata; Berkeley, Palo Alto (Clarke): Abies cilicia; Stan- 

 ford University, May, 1915. 



This aphid, easily recognized by the extremely long stigma of the 

 fore wings, has been found in the San Francisco Bay region infesting 

 the shoots of Monterey pine and Cilician fir. 



Group Vacunina Mordwilko 



This group contains but two genera, Vacuna Hey den and Glyphina 

 Koch. Mordwilko does not recognize Glyphina, as distinct from 

 Vacuna, although Tullgren does. The latter separates the two genera 

 as follows: 



1. Last abdominal tergite formed into a knob-shaped tail. Integument bare, 



and at most partially set with short lancet-shaped hairs Vacuna Heyd. 



Last abdominal tergite half-moon shaped, strongly swollen, but scarcely, 

 if at all, separated from the base. Integument set with stiff bristle-like 

 hairs and in apterous females with grain-like elevations ....Glyphina Koch 3 * 



45. Genus Vacuna Hey den 



Heyden, Ent. Beitr., vol. 2, p. 289, 1837. Type Aphis dryophila Schrank. 



177. Vacuna dryophila (Schrank) (?) 



Schrank, Fauna Boica, vol. 1, p. 113, 1801. Aphis (orig. desc.). 

 Davidson, Jour. Econ. Ent., vol. 7, p. 128, 1914. Chaitophorus sp. (desc.). 

 Davidson, Jour. Econ. Ent., vol. 10, p. 290, 1917 (desc.). 



Eecord. Quercus lobata; Walnut Creek (Davidson). 



Recently Davidson described this species from specimens taken on 

 valley oak in Contra Costa County, where he had observed it for three 

 years. The single alate female he has taken does not appear identical 

 with European specimens of V. dryophila, so he lists the species under 

 this name provisionally. 



This genus is not represented in California. 



