498 niE SOOTY mould op citrus trees, 



APPENDIX. 



MiCROCBRA coccoPHiLA, Desm. — Coccus-loving Microcera. 



(Plate XXXIV., lower division of Plate.) 



Minute, deep brick-red tubercles, rounded or flattened and 

 disc-like on surface, usually in small groups, visible to the naked 

 eye, hard and horny when dry, with short stem-like base. 



Hyphfe at base of gonidiophoi'es hyaline, septate, closely com- 

 pacted, 3-4 fjL broad. 



Gonidiophores tufted, filiform, elongated (at least 280/x), septate, 

 sometimes slightly constricted at septa, rose-pink in mass, with 

 finely granular, and often vacuolated contents, 4-4| /x broad. 



Gonidia same colour as gonidiophores to hyaline, curved, elon- 

 gated, usually blunter at free end than attached end, with finely 

 granular, nucleated contents, vai'iously septate, continuous up to 

 8-septate, average 5-6, size from tip to tip of curve and not actual 

 length 75-103 x 5|-8l fx. 



Parasitic on Red Scale of Orange and Shaddock (Aspidiotus 

 coccineus, Gennad.). July, August, Szc Botanic Gardens, Sydney, 

 New South Wales (Maiden). 



In the original description the gonidiophores are given as '2^ y. 

 thick and the gonidia as hyaline,, acute at each end, 3-5-septate 

 and 4-5 /x broad. This European species has only hitherto been 

 found in Queensland, where F. M. Bailey, the Colonial Botanist, 

 observed it on a Coccus infesting the Lemon. Mr. Try on also 

 refers to it in his "Report on Insect and Fungus Pests" as one of 

 the natural enemies of the Red Orange Scale; and Mr. French, 

 the Government Entomologist here, in his " Handbook of Destruc- 

 tive Insects," calls special attention to it as a jDOssible auxiliary in 

 keeping down the Red Scale, and possibly other scale insects. 



