OBSERVATIONS ON SCALE-INSECTS (COCCIDAE)— III. 



359 



although the latter are traceable in some examples, there are other marked difierences ; 

 in the first place, the antennae consist normally of eight segments a character not 

 noted in L. viride ; and secondly, the form of the anal lobes is quite defierent. In 

 the light of these important differential characters, I have given this insect specific 

 rank. 



Judging by the heavily infested leaves of the food-plant, this Coccid must cause 

 serious injury to the coffee under cultivation in Uganda. It may be interesting to 

 add that the examples from which I drew up the original diagnosis of Lecanium 

 {Coccus) viride var. africamim came from Lagos, West Africa, and that they also 

 occurred on coffee leaves. 



Lecanium cajani, sp. nov. 



Female, adult. Very elongate, with a faint median abdominal keel ; cephalic 

 area wrinkled; sides with faint radial ridges. Marginal spines covered with a 

 glassy secretion and forming a very faint fringe. Middle area of dorsum covered 

 with an extremely thin pinkish white secretion, which presents a hard even surface 



Fig. 12. Lecanium cajani, Newst., sp. n., $ ; a, a, antennae ; 

 h, stigmatic spines ; c, marginal spines ; d, anal lobes. 



resembling dried oil-colour, and is firmly attached to the integument.* The remam- 

 ing portion of the dorsum is of a bright yellowish-buff ; eyes and submarginal gland- 

 pores black. Young adults are pale, translucent yellow. Young parasitised examples 

 with the whole of the central area of the dorsum intense shining black. After treat- 

 ment with KOH the integument is thin and transparent. Antennae (fig. 12, a) of 

 seven segments ; 6th and 7th mth two long slender spinose hairs ; formula (one 

 examples': 3, (2, 4, 5, 6, 7) 1. The antenna on the opposite side is slightly malformed. 



* This may be an artifact produced by foreign matter. 



(C357) 



