A study of the scale insect genera Puto Signoret (Hemiptera: Sternorrhyncha: Coccoidea: Putoidae) and Ceroputo Šulc (Pseudococcidae) with a comparison to Phenacoccus Cockerell (Pseudococcidae) Author Han, Sarah I. text Zootaxa 2011 2802 1 22 journal article 10.5281/zenodo.207286 2be57930-4fab-46ee-9089-27e49ec71c95 1175-5326 207286 Phenacoccus Cockerell We have examined several species of Phenacoccus (listed in Table 1) including the type species, Ph . aceris , with particular emphasis on those species with more than two setae in the cerarii. Diagnosis of adult female. Eye height usually shorter than first antennal segment; antennae usually with 8 or 9 segments, but sometimes with as few as 6; 0–2 antennal intersegmental sensilla present between segments VI– VII, absent between segments III–IV, IV–V; 2 campaniform sensilla on each surface of each trochanter; claw lacking basal spurs; claw digitules capitate but tarsal digitules simple; 18 or fewer pairs of cerarii; tubular ducts usually absent on frons; trilocular pores on venter smaller than those on dorsum, dorsal and cerarian pores approximately equal in size; quinquelocular pores usually present. First-instar nymph: 6-segmented antennae; multilocular pores with>5 loculi absent. Adult male : head with one pair of dorsal and one pair of ventral simple eyes plus lateral ocelli; 2 pairs of lateral filaments on posterior abdominal segments (each filament from glandular pouch on each side of abdominal segments VII and VIII); penial sheath apparently 2-segmented, apex of aedeagus simple and slightly rounded or pointed ( Beardsley 1960 , 1962; Miller & Appleby, 1971 ; Hardy et al . 2008 ; Hodgson et al ., 2008).