CHAPTER XXVI 



TRIBE FIORINIINI 



The Uhlerian Scales 



The body of the adult female is always distinctly longer than broad 

 with the cephalic end bluntly rounded and the caudal end bluntly pointed. 

 The lateral margins are usually parallel or subparallel with the inden- 

 tations marking the position of the sutures between the thoracic and 

 abdominal segments generally more or less distinct. The lateral mar- 

 gins of the segments of the preabdomen are sometimes provided with 

 bracteae in the adult female or second nymphal female. Lobes are 

 usually present in the adult female, usually about two pairs, more or 

 less than this number may be present. Plates although frequently pres- 

 ent, may be absent; furcapectinae are never present. The incisurae are 

 narrow and the spaces may be filled or not with plates. Densariae and 

 paraphyses are never present. Altaceratubae are rarely absent and are 

 not arranged in pairs, their oraceratubae are ovate in outline, always 

 longer than broad. Brevaceratubae are rarely if ever present, never ar- 

 ranged in rows. Genacerores are frequently present, usually arranged 

 in five or three groups. The mesogenacerores, when present, usually 

 consist of about five cerores. The scale of the adult female is thin, 

 brownish or yellowish in color. It is much longer than broad, two or 

 more times, usually with the sides parallel, not enlarged at one end, 

 never transversely ridged, sometimes with a mesal carina. The first 

 exuvia projects beyond the cephalic end of the secretionary portion and 

 bears the porrect remains of the antennae. The wax is limited to the 

 periphery and is small in amount. The female always transforms in a 

 puparium and the pygidium of the adult female may be provided with 

 pseudolobes. The scales are usually exposed upon the host-plant, but 

 may be concealed in pits in the leaf or in galls. The scales produced in 

 galls are frequently opaque white, consisting in great part of wax and 

 the exuvia is one-fourth or less the length of the scale. The surface may 

 be flat, slightly convex, or slightly carinate. 



The first species of this tribe was described by Targioni 

 Tozzetti in 1867 as Diaspis fioriniae. The following year he erected 

 a new genus, Fiorinia, for this species and renamed the insect 

 Piorinia pelhicida. This latter name was used by Signoret and by 

 Comstock who described a second species, Fiorinia camelliae, which 

 was a serious pest in the conservatories of the United States 

 Department of Agriculture in Washington. In 1883 Comstock 

 called attention to the fact that Targioni Tozzetti had no authority 



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