Maskell. — Oil Coccidae. 387 



" from Sicily." It has never before been reported, as far as I 

 know, from any place south of the Line, nor mdeed from outside 

 Em-ope and Algeria, except that Comstock (Eep. 1883) says it 

 is sometimes found in the United States on oranges in the 

 markets. 



Genus Mytilaspis. 



Mytilaspis acaciae, sp. nov. Plate XIX., figs. 1, 2. 



Female puparium mussel-shaped, slightly convex, and 

 usually curved; colour dull dark -greyish -brown, scarcely 

 lighter than the bark of the tree ; length about i^i^- Larval 

 pellicle small, yellow, terminal ; second pellicle very incon- 

 spicuous, reaching about one-fourth the length of the pupa- 

 rium. 



Male puparium mussel-shaped, not carinated ; colour of 

 the secreted portion greyish-brown, lighter than that of the 

 female; length about -^-gin- Pellicle terminal, small, orange- 

 red in colour. 



In all the specimens seen the female puparia were massed 

 in great numbers on twigs, quite separate from the equally- 

 numerous male puparia ; and these latter, from their orange- 

 red pellicles, presented altogether a more ruddy appearance 

 than the former. 



Adult female dark-brown, elongated, the general form 

 normal of the genus; length about -gV"^' Abdomen ending in 

 four lobes, of w^iich the two median are the largest, and are 

 rather wider than long, with the outer edges crenulated ; 

 between these and the two smaller lobes are small marginal 

 depressions, with minute spines ; the small lobes are cylindri- 

 cal, with rounded emarginate outer edges ; beyond them the 

 margin of the abdomen is broken by many conical serrations 

 bearing spines. There are no gi'oups of spinnerets, but some 

 oval large pores. 



Adult male red ; form normal, presenting no special fea- 

 tures ; length of body about ^jin. The anal spike is as long 

 as the abdomen. 



Hab. In Australia, on Acacia linifolia. My specimens were 

 sent by Mr. Froggatt, from Hornsby, near Sydney. 



This is the species of which I remarked in my paper of 

 1894, under Aspidiotus extensiis, that I possessed a number of 

 male puparia but could not determine them in the absence of 

 the females. Having received these I have no doubt of the 

 genus of the insect, and from the absence of spinneret-groups, 

 and from the characters of the abdominal margin, I do not 

 hesitate to consider it as distinct. The separation of the 

 males from the females is, as I remarked in 1894, a not very 

 rare occurrence amongst Coccids. 



