45 



NEW SPECIES OF COCCIDAE FROM AUSTRALIA. 

 By E. Ernest Green, F.E.S., F.Z.S. 



Eriococcus serratilobis, sp. nov. (fig. 1). 



Ovisac white, strongly convex, broadly oval, narrower behind ; very closely 

 felted and tough. Length, 3*0 to 3-50 mm. Breadth, 2-25 to 2-50. nmi. 



Adult female broadly oval. Antenna (fig. 1, b) 6-jointed ; 3rd joint longest ; 

 6th almost equal to 3rd ; antennal formula 3, 6, 2, (4, 5). Legs well developed ; 

 tarsus as long as or longer than tibia ; tarsal digitules dilated and spatulate (fig. 1, c) ; 

 ungual digitules hair-like, minutely knobbed. Claw with a minute denticle close 

 to the point. Anal lobes (fig. 1, a) broad ; irregularly conical ; densely chitinous ; 

 the inner edge deeply serrate or pectinate throughout its w^hole length ; bearing 

 at the apex a longish slender spine followed by a long stout seta ; two stout spines 



Fig. 1. Eriococcus serratilobis, Green, sp. n. ; 

 a, posterior extremity of adult female, X 210 ; 

 d, antenna, x 210 ; c, part of mid leg, x 210. 



on the inner edge and a setiform spine on the ventral face. There is a densely 

 chitinous semicircular plate at the base of the lobes, situated dorsally. Margin 

 of body with a complete series of truncate conical spines. No spines on other parts. 

 Derm with numerous conspicuous circular pores, which are cup-shaped in profile. 

 Length averaging 1-50 mm. Breadth, 1-25 mm. 



Victoria : Mallee, on Eucalyptus gracilis (C. French, No. 142). 



I would draw attention to the peculiar character of the digitules in this species. 

 It is unusual to find dilated digitules in this genus, and it is still more unusual (if 

 not unique) for the dilated members to be those of the tarsal joint. When one pair 

 of digitules is dilated, it is almost invariably the unguals that display this character. 



