188G.] E. T. Atkinson — On the Boinopterous Family Cocciclog. 28"? 



surrounded with a white cottony substance covering all except the dor- 

 sal disc : — Gossyparia, Sign. [1. c. p. 20]. 



3. Adult apodous, antenna) in form of a short many-jointed stump, 

 body elongate, cylindrical, thrice longer than broad : rostrum in young 

 with a 2-jointed under lip : anal ring large, in form of a broad circle, 

 finely punctured and striated transversely, with six hairs not extending 

 beyond the abdomen : — Antonina, Sign. [Sign., 1. c. p. 24 : includes ? 

 Lahoulhenia, Licht., M. T. Schwer. Ent. Ges. v, p. 299, 1878]. 



4. Adult in most advanced stage with only last pair of feet, an- 

 tennae absent : body globular, rounded ; abdomen not visible ; a very 

 great mass of white cottony matter secreted by the insect and forming 

 an appendage : — Gapulmia, Sign. [1. c. p. 27]. 



5. Species enclosed in a simple felted envelope and preserving 

 the members during all stages of their existence : antennae in 2,6^ 

 jointed ; in larval <? , 7, and in adult <? 10- jointed : — halteres with a simple 

 bristle : style very short : knobbed hairs on some of the joints of the 

 antennae : — Eriococcus, Targ, [Sign., 1. c. p. 29]. 



6. Species enclosed in an envelope which is pointed at both ends 

 and of a greyish-yellow : Aca7ithococcus, Sign. [1. c. p. 34]. 



7. Species naked until fully grown, then the ? forms a dense 

 sac of waxy matter within which the eggs are laid : the full-grown 

 d* makes a similar sac or envelope within which it undergoes its last 

 metamorphosis ; antennae of larva and adult $ , 7-jointed : anal ring 

 with eight hairs : four digitules : — JRhizococctis, Sign. [1. c. p^ 36 : 

 Comstock, Rep. Dep. Agr. U. S. for 1880, p. 339]. 



8. Add perhaps species in which the adult ? has the body egg 

 or pear-shaped, not depressed, covered with a waxy envelope : antennas 

 and feet absent : rostrum very short, conical, not jointed : anal seg- 

 mient semiglobose, rest of the body of a more firm consistence and fur- 

 nished with an anal chitinous cone emitting a long, hollow filament 

 formed from the secretion : larva with 6- jointed antennae and feet : — 

 XyloGoccuSf Low [Yerh. Zool. Bot. Ges. Wien. xxxii, p. 274, 1882]. 



9. Also add species in which the adult ? is inclosed in a sac 

 elliptical in outline, very convex above, formed of a continuous waxy 

 secretion : ? itself elliptical, with neither legs nor antennae : two anal 

 tubercles : anal ring with eight spines : under-lip 2-jointed : — Gerococcus 

 Comstock [Rep. Dep. Agr. U. S. 1881-82, p. 213]. 



10. Add also a species forming a connecting link between the 

 Coccina and the Phylloxera group of the ApMdce having the head, thorax, 

 and abdomen reunited as in the latter : S entirely apterous : — Ritsemia^ 

 Licht. [Compt. Rend. Ac. Sc. France Ixxxviii, p. 870, 1879], 



37 



