20 



PAPEKS ON COOCID.^ OE SCALE INSECTS. 



sal pores is seen in other specimens, notably in the case of the pepper 

 sp&cimens alread}- referred to. This greater development in the 

 number of dorsal pores is not a character of great importance, and 

 much variation in this respect is seen in other species. The abund- 

 ance of dorsal pores seems to be governed to some extent hj climatic 

 conditions, a marked increase being often noted in specimens from 

 arid districts. 



The discovery of scattering paragenitals brings this species into 

 close relationship with the ancylus native to North America, and 

 places It m a group of species hitherto especially characteristic of the 

 New ^^'orld. It is interesting to note also that a related but a much 

 more strongly chitinized species, lacking paragenitals, has been re- 

 cently received from Transcaspian Russia. We Imow too little of the 

 scale-msect fauna of Asia and Africa to be able to generalize as to 

 what types of species are likely to be met with. 



ASPIDIOTUS (DIASPIDIOTUS) COURSETIiE n. sp. 



(Plate III, fig. 2.) 



Scale of female: 1.5 mm. in diameter, nearly circular, of medium 

 density, depressed; color gTa3nsh, more or less soiled bv adherino- 

 extraneous matter; exuvias sublateral, covered. " "^ 



Scale of male: Similar, of normal shape. 



Adult female: Length less than 1 mm., of normal peg-top shape, not 

 chitimzed; anal plate slightly more chitinized than body except for 

 lobes and apical and basal thickenings; median lobes only present; 

 laterals obsolete as in ancylus; outer shoulder of median lobes 

 prominent, inner shoulder minute, sometimes practically wanting; 

 paraphyses of two incisions beyond lobes strongly developed; inner 

 paraphyses of first incision terminating in a distinct oval knob lyino- 

 at right angles to the line of the thickening; spines normal, fairly 

 long; anal opening very minute and in line with the knobbed termi- 

 nals of the inner paraphyses of first incision. Paragenitals : Anterior 

 laterals, 1-3; posterior laterals, 0-1; dorsal pores few in number, 

 inconspicuous; transverse basal thickenings of dorsal surface in three 

 parts, consisting of a long, straight central line, sometimes broken at 

 middle, and two stronger lateral thickenings in the form of a double 

 curve. The ventral apical divaricating chitinized bands broad and 

 undivided. 



2Vpf.— Bureau of Entomology No. 14002. On Coursetia glandu- 

 losa, Hermosillo, Mexico; collected by Albert Koebele April 23 and 

 24, 1897 (Koebele No. type material, 1713). 



Note.— This species is closely allied to Aspidiotus suhsimilis Ckll. 

 The latter differs in having a more produced pygidium and lobes the 

 latter without inner shoulder, anus midway" of first thickening, 

 paragenitals absent, and in minor characters. This species ?s 

 scarcely more than a variety of suhsimilis: 



