August, '19] FERRIS: MEALY-BUGS 297 



about those of the anal lobes. Ventral side of the anal lobes with a quite large chitin- 

 ized area extending in from the base of the anal lobe setae. Dorsal body setae rather 

 few, small, stiiT. Ventral setae likewise few, slender, longer than those of the dorsum. 

 Tubular ducts for the most part confined to the venter, all small and without a raised 

 rim about the mouth. Anal ring of ordinary character. Anal lobe and anal ring 

 setae about equal, about one and one-half times as long as the diameter of the anal 

 ring. Antennae and legs presenting no unusual characters. 



Material Examined. From pineapples at quarantine from 

 Hawaii and West Indies; from roots of banana at Florence Villa; 

 pineapple at Frost Proof and citrus at Ft. Meyers, Florida. 



Pseudococcus virgatus (Ckll.) 



Fig. 17. Pseudococcus virgatus (Ckll.): dorsal aspect of anal lobe and portion of 

 penultimate segment. 



Habit. A rather slender form, attaining a length of 4.5 mm. 

 Thinly dusted with powdery secretion, with a pair of longitudinal 

 submedian dark stripes. Caudal tassels attaining about half the 

 length of the body, lateral tassels lacking. Dorsum bearing numerous 

 delicate, glassy, waxen threads which arise from near the margins. 

 Viviparous. 



Morphological Characteristics. With but a single pair of cerarii, these on the 

 rather prominent anal lobes, each with two (or sometimes three) quite largo cerarian 

 spines, numerous, but scattered, pores and a few slender seta>. The cerarii are not 

 surrounded by a chitinized area. Ventral side of the anal lobes sometimes with a 

 very small, cliitiui/.ed area, whicli is normally lacking. The most con.si)icuous feature 

 of the species is the i)resence of numerous, unusually large ducts, the mouths of 

 which are surrounded by a small, chitinized area which bears from one to four small 

 seta;. It is from these ducts that tlic glassy threads, which arc .so conspicuous in the 

 living in.sect, arise. The arrangement of these ducts is fairly (Icfiiiite. Kxcept for a 



