SCALE-INSECTS. 105 



white ovisac, longitudinally corrugated ; ovisac often much 

 longer than the insect, and becoming filled with oval red eggs. 

 Length of female, about Jin., reaching sometimes nearly iin. 

 Body previous to gestation lying flat on the plant, the edge 

 slightly turned up ; on the dorsum a longitudinal raised ridge, 

 forming one or more prominences. Insect covered all over with 

 numerous minute fine hairs, most thickly on the thoracic region ; 

 round the edge these hairs are longer, and are arranged in tufts 

 somewhat closely set ; the tufts are black, and contain from 

 twenty to thirty hairs in each. Amongst the hairs in the tufts 

 are several protruding tubular spinnerets, having on the outer 

 end a kind of multiglobular ring or crown ; from these proceed 

 cylindrical, glassy, straight tubes as long as the tufts of hair. 

 Long, fine, glassy, delicate filaments, as long as the body of the 

 insect, radiate from the edge all round ; but these, being very 

 fragile, are often irregular, or absen During gestation thick, 

 short, cottony processes form at the edge of the thorax, seem- 

 ingly attached to the feet. Antennse of eleven joints, very 

 slightly tapering ; each joint bearing hairsT Feet normal, some- 

 what thick. Rostrum not long; mentum triarticulate. Pro- 

 creation commencing soon after the first formation of the ovisac, 

 the eggs being ejected into the sac as it grows ; ovisac at com- 

 pletion containing sometimes as many as 350 eggs ; ovisac 

 convex above, sometimes irregularly split, more often nearly 

 conical, divided by several regular longitudinal grooves or ribs. 



Female of second stage dark-red, elongated, slightly convex, 

 active, covered with thin meal, or short curly cotton. Body 

 hairy with marginal tufts and spinnerets, as in adult. Anal 

 tubercles inconspicuous, but the abdomen exhibits three small 

 lobes on each side, from which spring six short setas. Antennae 

 of nine nearly equal joints, hairy. Feet normal, thick. Several 

 radiating, fine cottony filaments. Length of insect variable, 

 from ^(jin. to Jin. The dorsum exhibits the longitudinal raised 

 ridge, but less conspicuously than in the adult. 



Young larva, about ^in. long, dark-red, elongated, flattish, 

 active ; covered with yellow cottony down. Antennae of six 

 joints, hairy; the last joint is much the largest, clavate, 

 apparently four-ringed, bearing four long hairs. Feet slender; 

 d:gitules short, fine hairs. Eyes prominent, tubercular. Men- 

 tum biarticulate. Anal tubercles represented by three small 

 processes at each side of the abdominal extremity, each process 



