S. J. MCINTIRE ON SOME COCCIDS FROM BRITISH GUIANA. 355 



really the same. If you find any on the orchid-leaves you have 

 now received I should be very glad to have them ; if you have 

 none, perhaps Mr. Ward would be good enough to send some." 



In response to this I sent him the remainder of the leaves, but 

 I fear there were none of the scales on the few orchid-leaves that 

 came this time, such as he is in search of. There were, however, a 

 few scales, different to any that had previously been noticed. So I 

 drew his attention to these, and forwarded a rough sketch. His 

 reply came after a few days, as follows : — 



" Your sketch of the 14th instant represents the female of the 

 small white scale, which is the male. I think at present, subject 

 to further examination, that it is Oiaspis Cymbidii. Ask Mr. Ward 

 when he sends again to give the botanical name of the plants, that 

 is, the orchids he sent leaves of. The sketch just received is pro- 

 bably the same species (female) as that of the 14th, but distorted 

 by the action of a parasite. I am very glad to get these females. 

 The skin at the end is that of its own larva. This is a character 

 of the family Diaspina." 



It only remains for me to express my indebtedness to Mr. 

 Douglas for the valuable and interesting information he has so 

 freely furnished, and to G. S. Jenman, Esq., F.L.S., of the Royal 

 Gardens, George Town, for having started the subject. 



I am quite sure Mr. Ward will do all in his power to assist us 

 in further inquiries. 



EXPLANATION OF PLATE XXVI. 



Fig. 1. Scales of male Diaspis, or Chionaspis, on mango leaf. 

 „ 2. One of same, enlarged. 



3. Scales of female Diaspis cymbidiu 



4. „ „ Ischnaspis filiformis. 



5. Vinsonia stellifera. 



6. Immature scale of same. 



7. Scale of female Lecanium* acuminatum. 



8. Margin of same, enlarged. 



M 

 f> 



>» 



t) 



M 



* In my previous communication this name, which occurs three times, 

 should have been spelt Lecanium. — S. J. Mel. 



