13 



enemies, chief among which are the many introduced species 

 of Coccinellidae (ladybirds). 



The following technical description is inserted to facilitate 

 the determination of this species by entomologists, or anyone 

 who may have access to a compound microscope : 



"Female — 4% mm. long. Very white, mealy brown above except 

 dark purplish gray subdorsal stripes which are broadly interrupted 



centrally. Caudal filaments about 

 2 mm. long, i.e. about half length 

 of body. No obvious lateral appen- 

 dages. Segmentation distinct. Be- 

 neath whitish, legs pale brown. 

 The caudal filaments are rather 

 slender but not filiform like those 

 of D. longifilis. The lateral append- 

 ages seem to be represented by 

 long and very fine hairs, which are 

 obvious in the young but are lost 

 in the adult. Very young individ- 

 uals are pale yellow. Femur (of 

 adult) about as long as tibia; tibia 

 about three times as long as tarsus. 

 Antennae with eight joints — 3 and 

 8 subequal, or 8 a little longer; 2 

 sensibly shorter than 3; 4 rather 

 longer than 5; 5, 6 and 7 about 

 equal. 



"Male brown. Antennae brown; 

 all the joints with long hairs — 3 

 longest, longer than 1 and 2, decid- 

 edly longer than last; 4 same 

 length as 6; 5 a very little shorter 

 than 4; 7 decidedly shorter than 6 

 and slightly shorter than 5; 8 same 

 length as 7; 9 still shorter but not 

 quite so short as 1 ; 10 same length 

 as 5. The second joint, which is 

 about as long as 7 or 8, is conspic- 



uouslv enlarged, much thicker than 

 Q.-Pseudococcus virgatus (Ckll.) the joints following< » 

 Adult tern ale. (Original) 



Fig. 



Pseudococeus filamentosus, perhaps the most destructive spe- 

 cies of Coccidae in these islands, has been a pest of cotton for 

 several years. It also attacks other plants — hibiscus, mul- 

 berry, grape, but chiefly citrus trees. According to Koebele, it 

 was introduced about 1891. from Japan. It also occurs in 

 Jamaica and Mauritius. It attacked citrus trees at first but 



