NEW SPECIES OF DIASPINE SCALE INSECTS. 15 



thickenings slight, two short central rods and a larger lateral rod; 

 ventral thickenings inconspicuous, represented chiefly by a chitinized 

 line on each side below the first lateral incision. 



Type. — Bureau of Entomology No. 14136. Massed on the upper 

 surface of the leaves of cocoanut (Cocos nucifera), Santiago de las 

 Vegas, Cuba, collected August, 1904, by Wm. T. Home, chief of the 

 department of vegetable pathology of the central agricultural experi- 

 ment station of Cuba. Also on Citrus trifoliata, collected b}^ Mr. 

 Home, Santiago de las Vegas, Cuba. .Tanuary 13, 1906. 



Note. — This species seems lu De an intermediate one between 

 Asindiotus (Aonidiella) aurantii and Aspidiotus {ClirysompJialus) 

 dictyospermi. It, however, diff"ers distinctly from both of these spe- 

 cies; from aurantii by notable differences in the pores, plates, and the 

 presence of paragenitals, and from dictyospermi in the shape of the adult 

 female and of the anal plate, and in the character and shape of the 

 plates and lobes. In aurantii all the plates are distinctly subbranched 

 and the three broad plates of the third incision have each two promi- 

 nent apical branches which are distinctly subbranched. In dictyo- 

 spermi the anal plate is much more produced and with much longer 

 paraphyses, and of the three plates of the third incision the two pos- 

 terior have long, spindle-shaped branches, the anterior platfe two 

 short branches. There is a distinct difl^erence also in the shape of 

 the lobes. 



The specific variation in point of length of plates relative to lobes,. 

 and size of the lobes, position of the anal opening, etc., is illustrated in 

 the two photographs of the anal segment sho^^m on Plate II. The 

 upper figure is from t^'^pe material on cocoanut and the lower from 

 trifoliate orange. 



ASPIDIOTUS (DIASPIDIOTUS) AFRICANUS n. sp. 

 (Plate III, fig. 1.) 



Scale of female. \ Dull opac{ue bro^^^l, 1.5 mm. in diameter; circular, 

 moderately convex, with fairly prominent central nipple, and slightly 

 annulated as in peimiciosus; when rubbed, resinous exuviae appear, 

 and when old and massed the ashen appearance of pemiciosus is 

 presented. 



Scale of male: About 1 mm. long, of normal type. 



Adult female: 1 mm. long, oval. Anal plate 0.32 mm. broad at 

 base by 0.2 mm. long, normal, not produced. Median lobes like 

 those of ancylus, slightly converging toward tip; inner notch prac- 

 tically wanting; lateral lobes wanting or rudimentary, as in the case 

 of ancylus; two distinct lateral incisions; paraplwses of first incision 

 heavy, subequal, inner slightly largest; paraphyses of second incision 

 much smaller; minute but distinct paraphyses also are seen at the 

 inner base of the median lobes; plates minute, inconsjDicuous; spines 



