Eriococcidae, Cockerell, 1899

Miller, Douglass R. & Stocks, Ian C., 2022, New genera and species of felt scales (Hemiptera: Coccomorpha: Eriococcidae), with descriptions of new species and immature instars of described species, Zootaxa 5221 (1), pp. 1-213 : 11

Key to immature instars and adult females and males of most species of Eriococcidae in North America

1(0) Macrotubular ducts absent.............................................................................. 3

– Macrotubular ducts present............................................................................. 2

2(1) Without vulva; without translucent pores on hind coxa; antennae usually each 7-segmented............ second-instar male

– With vulva; usually with translucent pores on hind coxa; antennae, if well developed, usually each 6- or 7-segmented................................................................................................ adult female

3(1) Antennae with obvious setae............................................................................ 5

– Antennae without obvious setae......................................................................... 4

4(3) Posterior apex of last abdominal segment broadly rounded, not obviously developing into penial sheath................................................................................................third-instar male (prepupa)

– Posterior apex of last abdominal segment acutely rounded, obviously developing into penial sheath. fourth-instar male (pupa)

5(3) Labium well developed, with setae; penial sheath and aedeagus absent.......................................... 6

– Labium absent or poorly developed, without setae; penial sheath and aedeagus present........ fifth-instar male (adult male)

6(5) Flagellate setae usually absent from dorsum; posterior spiracles each usually with 1 associated multilocular pore; hind coxae each without weakly developed translucent pores............................................. first-instar nymph

– Flagellate setae present on dorsum; posterior spiracles each usually with 2 or more associated multilocular pores; hind coxae each with weakly developed translucent pores.............................................. second-instar female