DACTYLOPIIN.E. 147 



tary, or entirely absent; when present the last joint 

 of the antennae is usually much longer than the pen- 

 ultimate. Anal lobes generally small or rudimentary, 

 but well developed in Eriococcus. Anal orifice seti- 

 ferous.* 



Larvae exhibiting anal lobes and setiferous anal 

 orifice similar to those of the adult females. 



FEMALE. 



The females of this division are distinguished chiefly 

 by the character of the anal lobes, which, although 

 varying in degrees of development, are always present. 

 In the typical genus Dactylopius (PI. LXIV, figs. 3, 

 15) the lobes, with few exceptions, are very small or 

 rudimentary characters which also apply to the 

 genera Asterolecanium (PL LXII, figs. 2, 7, 8) and 

 Ripersia (PI. LXVII, fig. 4; PL LXVIII, figs. 5, 12). 

 All the members of the genus Eriococcus (PL LXXI, 

 figs. 5, 12) have large anal lobes, and for this reason 

 the genus has been placed by some authors in a sepa- 

 rate division of the Coccidge. The usual number of 

 hairs to the anal orifice is six or eight, but Cryptococcus 

 (PL LXX, fig. 4) has only four, while the exotic genus 

 Kermicus t has seventeen. 



FEMALE OVISAC. 



In Dactylopius the ovisacs are usually formed of 

 loose, white, flocculent secretion, often quite devoid of 

 form, and aggregated in masses on the food-plant 

 (PI. LXV, fig. 10). Some members of the genus 

 Ripersia provide similar ovisacs, while others are 

 formed of brittle, pulverulent, white secretion, or a 

 thick and rather closely felted secretion as in Ripersia 

 tomlinii (PL LXVIII, fig. 1). In Cryptococcus (PL 

 LXX, figs. G, 6 a) the ovisacs are also felted, and often 



* Cockerell ('Canad. Ent./ vol. xxxi, p. 277) inchides species having a non- 

 /setiferous anal orifice. I consider such species inadmissible to the group, 

 f Newstead, ' Ent. Mo. Mag./ s.s., vol. viii, p. 170, figs. 1-5 (1897). 



