Coccus, Linnaeus, 1758

Key to the Indian species of Coccus View in CoL based on adult females (partially adopted from Avasthi & Shafee 1991).

Note: As the available description of Coccus ramakrishnai (Ramakrishna Ayyar) is inadequate, it is not included in the key.

1(0) Ventral tubular ducts absent............................................................................. 2

-- Ventral tubular ducts present............................................................................ 4

2(1) Preopercular pores present. Dorsal setae spinose and conspicuously curved. Antennae each 8 segmented................................................................................................... C. longulus (Douglas) View in CoL

-- Preopercular pores absent. Dorsal setae spinose or cylindrical, not conspicuously curved. Antennae each 7 or 8 segmented ... ................................................................................................... 3

3(2) Marginal setae slender and simple, with apices pointed, not bifurcate or fimbriate. Dorsal setae straight and cylindrical..................................................................................... C. ophiorrhizae (Green) View in CoL

-- Marginal seta apices bifurcate, fimbriate and bluntly pointed. Dorsal setae spinose, straight to very slightly curved apically............................................................ C. mondouriensis Das, Pramanik & Das , sp. nov.

4(1) Each anal plate with a group of about 10 small dorsal setae medially. ................... C. kosztarabi Avasthi & Shafee View in CoL

-- Each anal plate without a group of small dorsal setae......................................................... 5

5(4) Preopercular pores usually present; if absent, then each antenna with fewer than 6 segments.......................... 6

-- Preopercular pores inconspicuous or absent. Each antenna always with more than 6 segments. ....................... 11

6(5) Dorsal submarginal tubercles present. Dorsal tubular ducts present or absent...................................... 7

-- Dorsal submarginal tubercles absent. Dorsal tubular ducts absent.............................................. 10

7(6) Tibio-tarsal articulation sclerotized. Dorsal tubular ducts generally present....................................... 8

-- Tibio-tarsal articulation not sclerotized. Dorsal tubular ducts always absent....................................... 9

8(7) Each antenna 7 segmented. Dorsal seta apices sharply pointed. Ano-genital fold with with 2 setae on each lateral margin.......................................................................................... C. hesperidum L.

-- Each antenna 8 segmented. Dorsal seta apices bluntly rounded. Ano-genital fold with with 3 setae on each lateral margin.................................................................................... C. gymnospori (Green) View in CoL

9(7) Each antenna 6 or 7 segmented. Marginal seta apices pointed or frayed. Pregenital setae numbering 1 or 2 pairs. Submarginal region of abdomen with ventral tubular ducts.............................................. C. capparidis (Green) View in CoL

-- Each antenna 4 or 5 segmented. Marginal seta apices all frayed. Pregenital setae numbering 3 pairs. Submarginal region of abdomen without ventral tubular ducts................................................... C. colemani Kannan View in CoL

10(6) Marginal setae setose with apices sharply pointed. Tibio-tarsal articulatory scleroses absent. Pregenital setae numbering 3 pairs................................................................................... C. formicarii (Green) View in CoL

-- Marginal seta apices frayed. Tibio-tarsal articulatory scleroses present. Pregenital setae numbering 2 pairs. ............................................................................................ C. latioperculatum (Green) View in CoL

11(5) Tibio-tarsal articulatory scleroses absent. Pregenital setae numbering 2 pairs............ C. almorensis Avasthi & Shafee

-- Tibio-tarsal articulatory scleroses present. Pregenital setae numbering 3 pairs.. ................................... 12

12(11) Dorsal tubular ducts present...................................... C. oecophyllae Das, Pramanik & Das , sp. nov.

-- Dorsal tubular ducts absent............................................................................ 13

13(12) Marginal setae strongly fimbriate. Ventral tubular ducts present medially on meso- and metathorax and anteriormost abdominal segment............................................................................ ... C. viridis (Green) View in CoL

-- Marginal setae frayed or pointed. Ventral tubular ducts mostly situated medially on mesothorax only..................................................................................................... C. discrepans (Green) View in CoL