ART. i:J. MASKELL genera of COCCIDAE MORRISON. 21 



Genus SOLENOCOCCUS Cockerell. 



Plate 1, fig. 5. 



Genotype. — Sol&nopfiora fagi Maskell. 



i?e/erewe.— Fernald, Cat. Cocc. World, 1903, p. 58. 



Maskell originally described this genus, using the preoccupied 

 name S 0167102) hor a ^ and including two species. Cockerell later 

 changed the name to that given above, but the type does not appear 

 to have been fixed until its publication in the Fernald Catalogue in 

 1903. 



The type species is represented in the Maskell collection by three 

 slides, one of "larvae on Fagus menziesii, Sept., 1889," one of 

 " female 2nd stage, on FagiLS menziesii, Aug., 1889," one of " adult 

 female on Fagus m£miesii, Aug., 1889," and by a few unmounted 

 specimens under No. 107. The National collection of Coccidae con- 

 tains a portion of the type material, and additional mounts have 

 been secured from it. The appearance and habit of the insect have 

 been satisfactorily described and figured by Maskell. 



Adult female. — Body oval, somewhat tapering behind, with a 

 large lobe projecting out over the anal ring and lobes®; antennae 

 minute tubercles bearing about 5-6 setae, and possibly very obscurely 

 segmented ; legs entirely wanting ; without spiracular spines ; mentum 

 short triangular, perhaps obscurely 2-segmented; body with long- 

 tubular ducts and 8-shaped and multilocular pores of two sizes, 

 tubular ducts most abundant along margin of body, but also present, 

 widely scattered, dorsally, 8-shaped pores quite variable in size, 

 rarely appearing trilocular and all more or less deeply set into cups, 

 the largest in a group on each half of the posterior body lobe, and 

 joined to these groups a continuous but irregular ventral band of 

 these pores, varying considerably in size and several deep, running 

 clear around the body margin without interruption, and finally with 

 numbers of these same pores, mostly quite small, scattered over the 

 ventral surface or in more or less distinct rows on the abdomen ; with 

 clusters of small, apparently quinquelocular disk pores accompany- 

 ing each spiracle, these scattered among the submarginal 8-shaped 

 pores for some distance opposite each spiracle ; also with minute cir- 

 cular disk pores accompanying the band of 8-shaped pores, their in- 

 ternal structure not determinable, but possibly tri- to quinquelocular ; 

 dorsally, near the posterior apex of the body, with two clusters of 

 small cribriform plates, each group composed of two to three separate 

 plates ; body dorsally apparently without setae, ventrally, particularly 

 on the posterior lobe, with a few, small, stout setae ; anal ring small, 



" The relative positions of the different structures as given in this description have 

 been studied very carefully and are believed to be correct, but it has not been possible 

 to segregate dorsal and ventral structures absolutely from the material at hand. 



