NEW SPECIES OF DIASPINE SCALE INSECTS. 29 



Type. — Bureau of Entomology No. 14128. On mango; collected 

 in the Department greenhouses; Washington, D. C, January 28, 1908, 

 b}' J. G. Sanders, in course of quarantine inspections. Dr. L. Reh, 

 of Hamburg, sent this species for determination June 27, 1904, as 

 from Singapore. 



Note. — Tliis species is a strongly chitinized pergandei lacking para- 

 genital pores and exlxibiting a much greater development of dorsal 

 pores. In this last feature it resembles some of the varieties of per- 

 gandei. It is further distinguished by the more produced, tapering, 

 exteriorly serrated lateral plates occurring in the incision posterior to 

 the fourth lobe, and also on the margin of the segment anterior to tliis 

 lobe. The large number of small parastigmatic 23ores is also a marked 

 character. 



It occurs massed as thickly as may be on the young mango twigs, 

 and evinces the prolificness characteristic of the genus. It is un- 

 doubtedly an offshoot oi pergandei, and may not deserve more than 

 varietal status. 



PABLATORIA PYRI n. sp. 



(Plate IX, fig. 1.) 



Scale of female: 1 mm. to 1.25 nun. in length, oval; exuvise of larval 

 and second stage and supplementary secretion normal to the genus, 

 the secretion, however, usually terminal, but its position varies some- 

 what as affected b}^ irregularities of the bark, sometimes sublateral 

 and sometimes more or less inclosing the posterior half at least of the 

 second exuvia. Larval exuvia purplish-green; second exuvia dark 

 olive, almost black, more or less overlaid with a grayish secretion; 

 supplement yellowish. 



Scale of male: Larval exuvia as in female; supplemental area 

 broad, circular. 



Adult female: Of the normal peg-top shape, 0.8 nnn. long by 0.6 

 mm. broad, hyaline. Anal plate distinctly triangular, very slighth' 

 chitinized; two pairs of lobes, compressed or close together, the 

 median more than twice the size of the laterals, and both pairs with a 

 deep exterior shoulder; second pair of lobes much lower than median 

 pair; edge of pygidium beyond plates, irregularly obtusely serrated; 

 incisions shallow and inconspicuous ; paraphyses wanting, or indicated 

 by a small point of chitinization at inner end of first and second lateral 

 marginal pores; plates short and inconspicuous, not exceeding lobes, 

 and extending a short distance laterally beyond lobes; spines normal; 

 anal opening fairly large, circular, subcentral or nearer base than tip 

 of pygidium. Paragenitals : Anterior group 1 to 4, anterior laterals 

 8 to 10, posterior laterals 8 to 12. The large oval marginal pores 

 characteristic of the genus are present, 5 to 6 on either margin of the 

 anal plate, with one central one between the median lobes, continued 



