TRIBE DIASPIDINI 



331 







tire, broadly rounded, mesal margins straight and 

 adjacent; second pair of lobes entire, incised, mesal 

 lobelet much larger than lateral, lateral mar- 

 gin oblique, lateral lobelet triangular; third pair 

 of lobes entire, incised, lobelets similar in shape, 

 smaller than second pair; plates long, slender, 

 arranged 0, 1, 1, 5-6, those of each lateris ar- 

 ranged l-l-3or4; genacerores 7-9(11-16)7-20. 



New Zealand on Dysoxylon, Hoheria, Melicytus. 



dysoxyli Mask. 



hh. Pygidium with second row of brevaceratubae pres- 

 ent, lateral group with 2-5, mesal group sometimes 

 wanting. 



i. Pygidium with median pair of lobes with proxi- 

 mal portion of mesal margins straight, adja- 

 cent, distal portion longer than proximal, 

 straight and strongly oblique, lateral margin 

 rounded, margins entire or finely serrate; sec- 

 ond pair of lobes incised, mesal lobelet much 

 larger than lateral, more than twice as long, 

 both broadly rounded, entire; third pair of 

 lobes incised, similar but smaller than second 

 pair; plates long, slender, arranged 0, 1, 1, 

 6-10, those of each lateris arranged Ior2-lor 

 2-4or6; dorsal oraceratubae arranged in rows; 

 anus located about its own width cephalad of 

 vulva ; genacerores 9-15 ( 17-28 ) 9-17. Massachu- 

 setts, New York, Ohio on Cornus.__corm Cooley. 



ii. Pygidium with median pair of lobes broadly 

 rounded, proximal portion of mesal margin near 

 but not adjacent and caudal portion strongly 

 divergent and forming with distal and lateral 

 margins broad curve; second pair of lobes in- 

 cised, mesal lobelet three times as long as lat- 

 eral, both broadly rounded, margins entire or 

 finely serrate; third pair of lobes incised, short, 

 lobelets much broader than long, distal mar- 

 gins truncate or roundly truncate, serrate; 

 plates long, slender, arranged 0, 1, 1, 6-11, those 

 of each lateris arranged l-l-4or9, plate in 

 each second incisura small, shorter than median 

 lobe; dorsal oraceratubae arranged in rows; 

 anus located its own width cephalad of vulva; 

 genacerores 7-16(22-32)16-22. United States, 

 Canada, England on apple, pear, cherry, 

 quince, peach, choke-cherry, walnut, mountain 



ash, elm, Pyrus, currant, hawthorn 



furfura Fitch. 



cc. Pygidium without plates in each second incisura, plates ar- 

 ranged 0, 0, 2, 7, those of each lateris arranged 2- (1-2) -(1-1), 



