27S THE CANADIAN ENTOMOLOGIST. 



5. 9 luiving the aspect of a Dactylopius .... Phenococcus, Ckll, 



9 covered with waxy lamella?, like an Orthezia CeroJ>ufo,S)U]c. 



6. Insect with large projecting marginal tubercles. . . . Tylococcus, Newst. 

 Without projecting marginal tubercles 7. 



7. Anal ring of 9 with more than 8 hairs Laclinodins^ Mask. 



Anal ring of 9 with 6 hairs 8, 



8. $ with four caudal filaments Oudablis, Sign.* 



^ (so far as known) with only two caudal filaments 9. 



9. Body very elongate ; antennae 8jointed, shorter and stouter than in 



Dactylopius ; eyes present ; mentum short Pergandiel/a, Ckll. 



( IVesiivoodia, Sign.) 



Body oval, usually with cottony tassel. Dactylopius, Cost^. 



Body subglobular, enclosed in a cottony sac Eriuni^ Crawford. 



(Type E. globosum.) 



10. Antennae 6- or 7-jointed ; when 7-jointed, distinguished from Dactylo- 



pius by the stouter legs and usually subterranean habitat 11. 



Antennae 5-jointed ; form elongate ; anal tubercles promi- 

 nent Rhizcecus, Kunck. 



I r. ^ apterous, with relatively short antennae Fonscolombia, Licht. 



{Pseudocheri?ies, Nitsche ; Apterococcus, Newst. j 

 Not so 12. 



12. Legs extremely thick, like crab's claws Pseudoripersia, Ckll. 



Not so ; legs ordinary 13. 



13. 9 enclosed in a waxy sac Cryptoripersia, Ckil. 



Not so i 4- 



14. ".\ntennt\; very close together " (Tinsley) Ripersiella, Tinsley, 



(R. runiicis and maritima.)'\ 

 Antennje normally placed Riper sia, Sign. 



15. Newly-hatched larva elongate, with 6jointed antcnnii; 16. 



Newly-hatched larva oval or suboval 17. 



16. Terminal antennal segment of newly-hatched larva oval, little longer 



than the one before Pscudoiecaniu?n, Ckll. 



Terminal antennal segment of newly-hatched larva very large, as 

 long as the three before C/uctococcus, Mask. 



■^A genus of few species, found in Europe ; when the male is unlinown, the female 

 is usually referred with safety to the large genus Dactylopius rather than to Oiidablis. 



tProf. Tinsley has named this genus, and indicated its characters, in a thesis for 

 the degree of B.S., presented to the N. M. Agricultural College, .May 31, 1899. He 

 will shortly prepare a paper describing the genus in detail. 



