TRIBE ASPIDIOTINI 407 



Ckll., Chrysomphalus odontoglossi CklL, Chrysomphalus biformis 

 cattleyae Ckll. Central America, Jamaica, Trinidad, Grenada, 

 Antigua on orchids. biformis CklL 



bb. Pygidium with each lateris not produced into a tooth-like pro- 

 jection near middle of its length. 



c. Pygidium with five to six pectinae on each lateris near a third 

 lobe, unapectinae, subequal in length to lobes, arranged 2, 2, 3, 

 5-6; median pair of lobes subquadrangular, usually with mesal 

 notch, lateral margin oblique, minutely serrate; second pair 

 of lobes subequal in size, lateral margin oblique, finely serru- 

 late; third pair of lobes slightly smaller than second pair, lat- 

 eral margin oblique, finely serrulate; anus located midway be- 

 tween vulva and caudal margin; genacerores (11-14)7-9. Japan 



on Quercus. jordani Kuwn. 



cc. Pygidium without pectinae on each lateris, pectinae broad, sub- 

 equal to lobes in length, arranged 2, 2, 3, 0; median pair of 

 lobes subquadrangular, truncately rounded, entire; second pair 

 of lobes similar in form and subequal in size; third pair of 

 lobes bluntly pointed, smaller than second, lateral margin 

 oblique, serrate; anus distant from caudal margin over twice 

 its own width; densariae in median, second, and third incisurae, 

 those of second longest; genacerores 2-4(5-7)4-5; dorsal ora- 



ceratubae numerous. Japan on Tsuga tsugae Marl. 



aa. Pygidium with median pair of lobes much larger than second pair, 

 b. Pygidium with five or more pectinae on each lateris. 



c. Pygidium with pectinae of median incisura distinctly longer 

 than median pair of lobes; median pair of lobes quadrangular, 

 subtruncate, deep mesal and lateral notches; second pair of 

 lobes narrow, pointed, nearly as long as median pair, not one- 

 half as wide; third pair of lobes much shorter than second 

 pair, narrow, bluntly pointed; pectinae deeply lacinate, ar- 

 ranged 2, 2, 3, 5, apparently all latapectinae ; genacerores (4-6) 



5-6. West Indies on cocoanut palm, banana palmae Morg. 



cc. Pygidium with pectinae of median incisura but little if any 

 longer than median lobes; median pair of lobes quadrangular, 

 rounded, distinct mesal and lateral notches; second pair of 

 lobes much shorter and about one-third width of median, blunt- 

 ly pointed, sometimes faintly notched; third pair of lobes 

 minute, pointed; pectinae deeply lacinate, arranged 2, 2, 3, 3, 

 those of each lateris deeply divided, strongly furcate, those of 

 median and second incisura f urcapectinae ; genacerores (3-5) 

 3-5. Massachusetts, District of Columbia, Ohio, Mexico, Brazil, 

 Venezuela, England, France, Ceylon, Mauritius on Cyanophyl- 

 lum, Ficus, Laurus, Cycas, Ipomoea, Pritchardia, Cinchona, 

 palms, orchids, tea. cyanophylli Sign. 



bb. Pygidium never with more than three pectinae on each lateris. 

 c. Pygidium with pectinae or plates on each lateris. 

 d. Pygidium with two or three pectinae on each lateris. 



