150 



ridgerl ; the second skin, small in other species, here forms 

 almost the whole of the scale. 

 Distribution. — Dr. Sinclair found it near Montego Bay, Jamaica, on 

 leaves of coconut palm. Mr. Morgan received it, also on 

 coconut, from Barbados. It is a hothouse species in Europe and 

 the United States. Maskell reports it from New South "Wales. 

 Mr. E. E. Green has recorded it (as F. palmce) from Ceylon. 

 Mr. Alex. Craw has found it on camellias from Belgium and 

 Japan. 



Food-plants. — Coco-nut palm, Livistona, Leptospermum, camellia, 

 Areca aurea, Phytelephas macrocarpa, Cycas revoluta and Kentia. 

 Destructiveness. — Not usually very abundant, but destructive when 



it becomes so. 



Varie'i s — Under the above name are include! some varieties, which, 

 may possibly be distinct though allied species. Comstock 

 thought the form he found on camellia was a distinct species, 

 and named it I. camellia?, but it is generally admitted now that 

 he was mistaken. Mr. Green also described the Ceylon form as 

 new, but he no longer considers it distinct. The most distinct 

 variety I have seen was crowded on the under side of a leaf of 

 Camellia japonica from Baton Rouge, Louisiana, sent by Prof. 

 Morgan. In this the female scales seemed a little larger than 

 usual, and were dark brown, much darker than those ordinarily 

 found on palms ; the middle of the scale became actually black, 

 while the ends were a red brown. There were numbers of mal<3 

 scales with them, white with a slight median keel and very 

 pale exuvia. I found an orange-yellow male with white wings. 

 This does not seem to be quite the same asComstock's camellia}. 



Genus Ischnaspis. 

 (71.) Ischnaspis iiliformis. Douglas ( The Black -line Scale.) 

 Diagnosis. — The most easily recognized of scales, appearing as a short 

 black line on the leaf it infests. It frequently occurs in numbers 

 giving the leaves a very odd appearance. 

 Distribution. — It seems to be very abundant in Trinidad ; it is also 

 found in Jamaica, Antigua, Grenada, South Australia, Japan, 

 British Guiana and in hot houses in Europe and the United 

 States. 



Food-plants. — Various palms, Dictyospermum, Strychnos, Myristica, 



Mango, Panda nus, Cycas, Mons'era, &c. 

 Destructireness. — Not usually comp'ained of, but in Trinidad Mr. 



Hart s iys it " is a great trouble to us on Cycas and several palms 



and aroids." 



Note. — M. Simon has applied the name Ischnaspis to a genus of spi- 

 ders from St. Vincent. Our genu6 has priority, and a new name 

 will have to be given to the spider-genus. 



Genus Aspidiotus. 

 This genus includes the small round usually more or less flat scales 

 so common almost everywhere. It is very numerous in species. 

 (72.) Aspidiotus sacchari. Ckll. (The Sugar-cane Aspidiotus.) 

 Diagnosis. — Scale white tinged with greyish, or rather a kind oi 

 pinkish brown. Exuviae darker, first skin brown, second orange. 



