Comparison of the morphology of the adult males of the rhizoecine, phenacoccine and pseudococcine mealybugs (Hemiptera: Sternorrhyncha: Coccoidea), with the recognition of the family Rhizoecidae Williams 3291 Author Hodgson, Chris text Zootaxa 2012 2012-04-30 3291 1 1 79 https://biotaxa.org/Zootaxa/article/view/zootaxa.3291.1.1 journal article 10.11646/zootaxa.3291.1.1 1175­5334 5250048 EUMYRMOCOCCUS Silvestri Eumyrmococcus Silvestri, 1926: 271 . Type species: Eumyrmococcus smithii Silvestri , by original designation. Introduction. At present, 20 species of Eumyrmococcus are known ( Schneider & LaPolla, 2011 ), divided into two species-groups, the E. scorpioides species-group with three species and the E. smithii species-group with 17 species. Adult males are only known for the latter species-group: E. sarawakensis Williams ( Fig. 16 ) and E. taylori Williams ( Fig. 18 ) ( Williams, 1998 ), and E. smithii Silvestri ( Kishimoto-Yamada et al ., 2005 ) ( Fig. 17 ). These can be separated using the key below. A generic diagnosis and key to the identification of the adult females of all 20 species can be found in Schnieder and LaPolla (2011). For a morphological diagnosis of the males of this genus, see key above.