63 



ON SCALE INSECTS (COCCIDiE) &c. FROM THE 

 UGANDA PROTECTORATE. 



By EOBERT NEWSTEAD, M.Sc, A.L.S., &c., 



The Scliool of Tropical Medicine, The University/, Liverpool. 



The following notes are based on a small collection of Coccid^ recently 

 received by the Entomological Research Committee from Mr. C. C. Gowdey, 

 the Government Entomologist in Uganda. 



Stictococcus dimorphus, sp. n. 



Adult female. — Hemispherical, with a distinct broad V-shaped depression 

 on the dorsum immediately in front of the anal orifice ; integument covered 

 with short stout fulvescent spines, between which are one broad marginal 

 and two subdorsal bands of white granular secretion ; the secretionary matter 

 is, however, so much destroyed or hidden by a black fungus that it is 

 impossible to ascertain definitely the exact course which it takes. The 

 denuded integument is shining black. Venter with a large deep marsupium 

 or circular orifice at the posterior extremity, occupying one-third of the 

 ventral area ; in many instances this was filled with larvse. Antennae short, 

 of four segments, and about equal in length to the anterior femur. Marginal 

 spines resembling those on the re»t of the body, but set much more closely 

 together. Legs short, but well developed; claw furnished with a long 

 ventral digitule, wdiich is slightly dilated anteriorly. Derm of venter with a 

 few scattered spinnerets and also a few minute spines. Dorsal spines simple, 

 about equal in length to the tibia, though a few examples near the margin 

 are much longer. Anal orifice surrounded by a broad ring of chitin ; upper 

 operculum crescentic, bearing from 7-9 hairs ; lower operculum with 4-6 

 hairs. 



Diameter (greatest) 2*50-4 mm. 



Larva of female (fig. 1). — Ovate, but gradually narrowed posteriorly. 

 Anal orifice large ; outer ring ovate, broad ; upper operculum crescentic, 

 with four large spinose hairs ; lower operculum narrow, taking the contour of 

 the outer ring of chitin, this bears two spinose hairs. Dorsal spines (fig. 1 a) 

 in six rows, two submedian, two submarginal, and one marginal ; those on the 

 dorsum proper are uniform both in length and thickness and all are faintly 

 serrate, the serrations widely separated, each tooth-like projection carrying a 

 minute hair : the marginal spines vary considerably in length ; some of those 

 on the cephalic and thoracic segments being equal to, if not in some instances 

 longer than, the entire length of the body, and there are at least four similar ones 

 at the anal extremity ; all these have the basal portions (fig. 15) faintly serrate 



BULL. ENT. RES. VOL. I. PART I. APRIL 1 9 10. 



