38 PROCEEDINGS OF THE NATIONAL MUSEUM. TOL. «0, 



As is noted by Ferris, this genus is separable from Antonina Sig- 

 noret (as represented by the American and some other species) only by 

 the retention of the legs in the stage preceding the adult, and by hav- 

 ing the derm pores of the trilocular type only, all the species of 

 Antonina available for examination (six in all) having large multi- 

 locular disk pores in addition to the triloculars. 



Genus EREMOCOCCUS Ferris. 



Plate 2, fig. 5. 



Genotype. — Syhaerococcus pirogaUis Maskell. 



References. — Fernald, Cat. Cocc. World, 1903, p. 87. — Ferris, Can. 

 Ent., vol. 51, 1919, p. 252. 



This is another genus recently described by Ferris, and so char- 

 acterized that but little needs to be added to the previous descriptions. 

 It has been possible to make certain corrections and additions, 

 notably with respect to the curious invaginated character of the an- 

 tennae in the adult female. Only the type species has been placed in 

 this genus thus far. 



The Maskell collection contains six slides of this species, one labeled 

 "2nd stage female, 1893," two labeled "adult female, 1893," and 

 three labeled " adult male, 1894," and a lot of material under Maskell 

 No. 364, including a numerous cluster of the galls of the species. The 

 following descripti\^ notes have been prepared from this material. 



Adult female. — Enclosed in a pear-shaped gall as described by 

 Maskell; body an oval sac, flattened above, with an oval, somewhat 

 chitinized dorsal disk, corresponding to the flattened area, occupy- 

 ing most of the dorsum and presenting a rather nodulose appearance ; 

 with a wide band, consisting of numerous scattered, long, slender 

 setae and large 8-shaped pores around the margin of this area, venter 

 apparently without pores ; with a few scattered setae anteriorly, and 

 a rather numerous cluster around the vaginal opening ; antennae of 

 peculiar structure, the number of segments not exactly determin- 

 able, consisting of a short evaginated tubercular collar, and a long 

 invaginated tube passing through the collar and far within, with 

 about 5-6 large, stout setae of varying lengths lying at the bottom 

 and pointing up through the tube toward its opening, the longest 

 fully half the length of the tube ; spiracles peculiar only in their lack 

 of the multilocular disk pores that usually accompany these struc- 

 tures; legs entirely lacking; internal framework of mouthparts, as 

 noted by Ferris, large and heavily chitinized; mentum apparently 

 indistinctly 2-segmented; derm pores apparently only of the large 

 8-shaped type already mentioned, none of the loculi indicated by Fer- 

 ris in his figure of these pores visible in specimens examined by the 

 writers; derm setae of one type, as already described; anal ring 



