292 E. T. Atkinson — On the Homojoterous Family Coccidae. [No. 3, 



anal ring of the previous group, whicli is here replaced by a simple 

 hairless opening placed at the extremity of the abdomen : eyes smooth, 

 two ocelli : antennas in the adult ? only 7- jointed ; larval ? with 6 

 and larval S with 7 joints. The species recorded are from N. and S. 

 America, China, Australia, New Zealand, and Rodriguez island. 



Subdivision Monophlebaeia. 



MonopUehites, Sign. A. S. E. F. (5 ser.) v, p. 350 (1875.) 



This group is formed for those species of the sub-family Coccina 

 in which the ? has 11 joints in the antennae and the c? has 10 joints ; 

 each of these joints has a node or swelling and a whorl of hairs which 

 makes it appear double and has thus led some authors to give 22 — 25 ' 

 joints to the antennee : the eyes are compressed with numerous facettes 

 but there are no ocelli in the c? : instead of the ciliated anal ring of the 

 Dactyloparia, we have a single ring placed before the extremity of the 

 abdomen. The group includes the following genera : — 



1. Covered with a cottony matter varying in colour and with a 

 secretion of still larger filaments : two horn-shaped digitules on the 

 claw and two on the tarsus but without knobbed tips : antennae in 2 

 with 11 joints ; in larva 6- jointed with a long pubescence : genital 

 apparatus ending in a tube internally with a reticulated ring like a 

 sphincter and without hairs at its extremity: — Icerya, Sign. [1. c. 351 : 

 Comstock, Rep. Dep. Agr. U. S. for 1880, p. 347]. . 



2. As preceding : the pubescence very long with two knobbed hairs 

 on the last joint of the antennae : no digitules : — Guerinia, Targ. [Sign. 

 1. c. 352]. 



3. Only nine joints in the antennae, rest as in Monophlebus : — 

 Vrosiclia, Walker. [Sign. 1. c. 353 : Walker, List Hom. B. M. Sup. 

 p. ^06, 1858]. 



4. Antennae very long ; eyes reticulated : lateral margins of the 

 abdomen in the $ without appendages : — Leachia, Sign. [1. c. 359]. 



5. Antennae with 11 joints in ? , 10 in ^ : no digitules but simple 

 hairs : lateral margins of the abdomen in the S with rounded tubular 

 appendages : antennae in 2 conical, moniliform with a very short pubes- 

 cence : — MonophlebuSy Leach. [Sign. 1. c. 368]. 



6. Body covered with a white secretion : antennae 11- jointed, 

 conical : feet stout, claws short, no digitules : a spare pubescence in 

 form of S|5ines on the inner side of the feet and of hairs on the outer 

 side : teguments with rounded spinnerets mingled with some hairs 

 and light semitransparent spaces ; — Ortonia, Sign. [1. c. 367]. 



