1886.] E. T. Atkinson — On the Homopterous Family Coccidoe. 285 



Subfam. Coccina. 

 Coccides, Sign., A. S. E. F. (4 ser.) ix, p. 102 (1869) ; (5 ser.) iv, p. 546 (1874). 



9 varying in form and in the substance of the skin or covering : 

 in the last stage generally inclosed in a sac or envelope secreted at the 

 time of laying the eggs and which is cottony in Dactylopius, Coccus, &c., 

 felted in Eriococcus ; globose and more or less scaly or corneous in 

 Kerwies ; calcareous in Margarodes ; or it is naked and reclines on a 

 cottony cushion as in Nidularia. The under-lip is 2 — 3-jointed : abdo- 

 minal lobes or plates are absent, but on each side of the abdomen at the 

 a.nal extremity are tubercles which carry a more or less long bristle. 

 The segments are easily visible in the larva, less so in the adult ; each 

 segment has on each side one or more spinose appendages : antennae 

 vary much in the number of joints, usually six in the larval state and 

 6—10 in the adult : legs as in all the Goccidce. In the adult ? one can 

 find, by maceration in caustic potash, the antennae sometimes deformed, 

 the feet, but sometimes these are wanting, and the lower-lip always. 

 The S only differ from the c? of the sub-family Lecanina in the shorter 

 armature : they are small, with long antennae, generally 10-jointed, 

 filiform, pubescent ; four eyes and usually ocelli : wings large, mem- 

 branous, transparent : halteres 3-jointed ; femora long, pubescent ; 

 tarsi one-jointed, one-clawed, usually with four digitules : abdomen 

 more or less long and broad with a bundle of hairs on the last segment, 

 whence proceed 2 — 4 very long threads formed of a white, fragile 

 secretion. 



The following subdivisions are suggested in this subfamily : — 



1. Species having the globular shape of some forms of Lecanium 

 and easily taken for them, but with a multiarticalate under- lip and 

 without the Lecanid abdominal lobes in the larva, though possessing 

 them in the adult stage : — Kermesaria. 



2. Species of an elongate form resembling the genera of the group 

 Bactyloparia, more or less pubescent : antennae 6 — 7-jointed : an emar- 

 gination more or less visible at the end of the abdomen between the 

 lobes, which are furnished with 5 — 6 hairs, of which one is very long : — 

 A^itliococcaria. 



3. Species varying in form and the number of joints in the antennae, 

 with an anal ring visible, which has 6 — 8 hairs and spinnerets secreting 

 a cottony matter: tarsi and claws with digitules: 2— 4 filamentary 

 processes at the extremity of the abdomen : — Dactyloparia. 



4. Species without an anal ring and having merely an opening at 

 the end of the abdomen : — Coccaria. 



