THE SCALE INSECT GENUS ASTEROLECANIUM 109 



to posterior ends of median carina: flat ventrally ; pale greenish yellow, t. 

 parent, very thin: marginal filaments pale yellow to whitish. 



Adult male. — 1 mm. long. 



Head: Antenna 10-segmented, formula (longest to shortest >. III. IV. V. VI. VII, 

 VIII. IN. N. II. I: antennal setae, I. 1 : II. T : III-N. 12-18 and X also with 4 

 very long setae and 1 that is stout: basal bars diagonal; approximately 15 

 setae anterior to ventral eyespots, 1 or 2 on dorsal surface. 



Thorax: liar between wing bases rectangular, four times as a ride, with 

 a faint median longitudinal fold; tibia one-sixth longer than tarsus. 



Abdomen: Five segments each with a pair of setae dorsally on lateral margin, 

 4 or 5 segments each with a pair of setae in ventral lateral area : lotx - indie 

 each with 1 long and 2 short setae: penis sheath with 2 setae dorsally at base, 

 6 or 7 setae ventrally at base, and 4 or 5 setae on each side of ventral opening. 



Data. — Bedescribed from unmounted material and the following- 

 mounted specimens collected on Quercus: One female. 35 larvae, and 

 1 male on Q. Hex, Nice, France, determined as quercicola by Signoret, 

 and used as the basis for the erection of Aster odiaspis, loaned by M. 

 Beier; 2 females and 6 larvae on Q. ilex, Montpellier, France, de- 

 termined as quercicola by Signoret, loaned by M. Beier: 1 female, 

 Europe. Maskell Collection No. Q>5. labeled quercicola Bouche: 1 female 

 on Q. ilex, Portici. Italy. Chermotheca Italica. Fasc. II. Xo. 47. Berlese 

 and Leonardi. 1895; S females. 52 larvae, and 2 males on Q. Hex. near 

 Ajaccio. Corsica. O. Jaap, February 25. 1013. Jaap Collection Xo. 

 122b: 5 females and 4 larvae on Q. ilex, El Guerrah. Constantine, 

 Algeria. A. Balachowsky, November 15. 1926: 3 females on Q. eoeeifera 7 

 Alger. Algeria. A. Balachowsky. January 1927: 4 females on Q. ilex y 

 Constantine. Algeria. A. Balachowsky, from E. E. Green, received 

 June 3. 1927: 4 females and 10 larvae on Q. ilex, Agay. Var, France. 

 A. Balachowsky. April 23. 1930: 2 females and 1 second-stage specimen 

 on Q. ilex. Ajaccio. Corsica. A. Balachowsky. Xovember 4. 1930; 2 

 females on Q. suber, Spain, intercepted at Philadelphia, Pa., W. J. 

 Ehinger. December 28. 1932: 2 females on Q. ilex. Portici, Italy, from 

 F. Silvestri. received May 1934. 



This species, placed as a synonym of variolosum by Lindinger in 1912 

 (61. pp. 280. 860), is valid a- considered by Leonardi (57, pp. I 

 and other writers. It is closely related to quercicola and variolosum^ 

 but differs from them in habit as well as in structural details. It is 

 found on both surfaces of the leaves and does not prod ace pits, whereas 

 quercicola and variolosum occur on the bark and do cause the forma- 

 tion of pits. Several characters of the adult females of the three 

 species differ in degree. Specimens of ilicieola are consistently 

 larger than specimens of quercicola and have fewer marginal quincme- 

 locular pores than either quercicola or vceriolosum. In ilicieola there 

 are very few minute dorsal 8-shaped pores and also few dark-rimmed 

 8-shaped pores, whereas in quercicola and variolosum the minute dorsal 

 8-shaped pores are numerous and the dark-rimmed 8-shaped pores are 

 usually numerous around the beak and spiracular areas. 



In the larvae the absence of marginal 8-shaped pores in ilicieola is 

 in striking contrast to the presence of 28 such pores in qui rcicola and 

 variolosum. The occurrence of dorsal 8-shaped pores in the larvae 

 of ilicieola from Corsica is unusual, there being no indication of such 

 pores in the other larvae studied. In other characters, however, the 

 larvae from Corsica agree with those from other lots, and the adult 

 seems the same as the adults from other sources that are considered 

 to be ilicieola. 



