Genera and Species of Coccitla3. 25 



Type Fpkoccus acacuv {Coccus acacice, Maskcll, Tr. N. Z. 

 Inst. xxix. p. 319). Australian. 



This is near the stem-form from winch Sjjhccrococcus must 

 have been derived. 



LuzULAsris, n. n. 



Siijnoretiii, Targioni-Tozzetti ; not of Stal, 1800. 

 Type Luzulaspis luzuhe {Afpidiotus hiziihr, L. Dufuur ; 

 Signoretia clypeata, Targ.). European. 



Plienacaspis natalensis^ sp. n. 



? . — Scale white, about 3 millim. long, pyriform ; exuvias 

 pale orange-brown. 



Five groups of circumgenital glands ; median of 10, ante- 

 rior laterals 22-26, posterior laterals 19-26. Anal and 

 genital apertures opposite. Median lobes large, widely 

 diverging, broader than long, the long inner margin strongly 

 serrulate ; tiieir bases well apart, the space occupied by the 

 usual pair of short spines. Second lobe represented by three 

 elongated and rounded lobules, the first of which is largest 

 and bears a spine. Third lobe represented by a very long 

 narrow lobule bearing a spine, followed by a broad and mueli 

 shorter lobule, and then a very broad seirulate lobule^ having 

 its outer slope much the longest. The fourth lobe is repre- 

 sented by a triangular lobule bearing a spine and two slight 

 swellings of the nuirgin, too slight to be called lobules. 



cJ . — Scale feebly triearinate or barely keeled at all. 



Hah. Durban, Natal, abundant on underside of leaves of 

 mango {Claude Fuller, no. 23). 



Closely allied to Fhenacaspis chinensis {Chionaspis chi- 

 nensi's, CklJ. liep. Cal. Bd. Hort. v. p. 37), but the median 

 lobes are more sloping. Of the Ceylon species described by 

 Green it comes nearest to Plienacaspis megaloha {Chionaspis 

 megaloba, Green, ' Coccidaj of Ceylon,' pt. ii. 1899) ; but mega- 

 loha has two lobules in place of the slight swellings of the 

 fourth lobe described above, and differs also in the position of 

 the anal and crenital orifices. 



&' 



llemichionaspis cyanogena, Ckll., 1901. 

 A new locality is Verulam, Natal {Fuller, no. 13), 



Odonaspis secretus, var. Greenii, no v. 



Aspiih'otns secreius, Green, Coccidse of Ceyloi:!, pt. i. p. 04, {JIal?. 

 Ceylon.) 



Green and Maskell have pointed out distinctions betweeu 



