Monophlebiiice. 429 



Synopsis of Genera. 



A. Larvae with six-jointed antennae. Adult females naked, or 



with mealy or woolly covering, or with fragile secretionary 

 appendages ; never with hard, dense, waxy appendages. 



a. With a clypeus-like lobe covering the mouth parts 



(Clypeococcus.) 



b. Mouth parts exposed. 



a)-. Dermal pores all of approximately one size and type. 

 Antennal joints of male tri-nodose ... MONOPHLEBUS. 

 h^. Dermal pores usually of two or more sizes and forms. 

 Antennal joints of male bi-nodose. 

 cv'. Adult female with a deep invagination of the venter 



(Steatococcus.) 

 b^. Adult female without invagination of venter... Icerya. 



B. Larvas with five-jointed antennae. Adult females with dense, 



hard waxy appendages on the dorsum, or on the marginal 

 area alone. 



a. Adult female with ten-jointed antennae. 



a)-. Adult female without invagination of venter 



Walkeriana. 

 b^. Adult female with invaginated venter. 



rt". Entrance to invagination closed by an operculum. 

 cv^. Dorsum with prominent chitinous process or pro- 

 cesses (LOPHOCOCCUS.) 



b^. Dorsum without chitinous processes 



ASPIDOPROCTUS. 

 b". Invagination closed by lateral labiae, without oper- 

 culum Labioproctus. 



b. Adult female with eleven-jointed antennae Nietnera. 



