lU. 



ON THE COCCID^ (SCALE INSECTS) OP TRINIDAD. 



By T. D. A. CocKERELL. New Mexico (U.S.A.) Agricultural 



Experiment Station. 



I HAVE just finished studying a very interesting series of Coccidae col- 

 lected in Trinidad by Mr. J. H. Hart and Mr. W. Lunt, and at Mr. Hart's 

 suggestion offer a revised list of the species known from that island, with 

 notes on those which are of interest among the specimens lately received. 

 It suggests that the West Indian Coccidse are becoming pretty well known, 

 that among so many specimens have been foimd only one new species and 

 one new variety. A striking contrast is offered by the Coccidae of Japan, 

 which the present writer has lately been studying, among which the per- 

 centage of new species is very much greater. Similarly, the Coccidae of 

 Ceylon, studied of late by Mr. E. E. Green, offer a very large percentage of 

 novelties. 



In the following list the collectors are designated by letters : U.^F. W. 

 Urich. H.=J. H. Hart. L.=Wm. Lunt. G.=P. L. Guppy. P.=W. V. 

 Pierce. C.=H. Caracciolo. The species and varieties marked ("■') are at 

 present only known from Trinidad. 



1. Icerya montserratensis, R. & H. — 



H. U. L. 



2. Icerya rosce, R. &. H. — U. H. 



3. Dactylopius nipa. Mask. — U. 



4. Dactylopius citri, Boisd. — U. 



*5. Dactylopius sacchari, Ckll. — U. H. 



6. Dactylopius virgatus var. farinosiis, 



Ckll.— U. H. 



7. Phenacoccus barberi, Ckll. — U. H. 



8. Orthezia insignis, Dougl. — U. H. 



9. Orthezia prwlonga, Dougl. — H. 



10. Asterolecaniv/m oncidii, Ckll. — H. 



11. Astcrolecanium aureum, Boisd. — L. 

 *12. Asterolecanium urichi, Ckll. — U. 



13. Asterolecanium miliaris, Boisd. — U. H, 



14. AsterQlecaniuiaham,b%i.sce, Boisd. — U.L, 



15. Pulvinaria brassia, Ckll. — H. 



16. Pulvinaria simulans, Ckll. — U. 



17. Pulvinaria pyriformis, Ckll. — U. 

 *18. Lecanium nanum, Ckll. — H. 



19. Lecanium mangifercv, Green, H. 



20. Lecanium he speridum, L. — H. 



21. Lecanium urichi, Ckll. — U. 



22. Lecanium depressum, Targ. — U. H. 



23. Lecanium olece, Bern. — U. H. 



24. Lecanium hemisphcericum, Targ. — 



G. U. C. H. 



25. Vinsonia stellifera, Westw. — U. H. L. 

 *26. Inglisia vitrca, Ckll. — U. 



27. Chionaspis brazilicnsis, Sign. — U. H. 



28. Chionaspis minor, Mask. — U. H. 



29. Chionaspis citri, Comst. — H. C. 



30. Chionaspis biclavis, Comst. — H. 



31. Aulacaspis boisduvalii. Sign. — U. H. 

 .S2. Pinnaspis pandani, Comst. — U. H. L. 



*32a. „ ,, var. albus, Ckll. 



— U. H. 



33. Mytilaspis citricola, Pack. — U. P. H. 



34. Ischnaspis liliformis, Dougl. — U. H. L. 



35. Diaspis amygdali, Try on. — U. (syn 



lanatus). 

 *36. Aspidiotus hartii, Ckll. — H. 

 *36a. ,, ,, var. i?m<u, Ckll.— L. 



37. Aspidiotus dictyospermi, Morg. — H. 



38. Aspidiotus palmfe, Morg. & Ckll. — U. 



39. Asjudiotiis dcstrxictor, Sign. — U. H. 



40. Aspidiotus articulatus, Morg. — U. H. 



41. Aspidiotus biformis, Ckll. — H. G. 



1. Icerya montserratensis. — Fine specimens on rose (Hart). Plenty, 

 with a few IscJmasjns filiformis, on a palm (Lunt). 



2. Icerya rosce. — Immature specimens on Bassia with an ant (Hart) . 

 A few, young, on Mimusops (Hart). On Amherstia (Hart). 



7. Phenacoccus barberi on Hibiscus leaves (Hart . Formerly des- 

 cribed as a variety of P. yuccce, but I think it is a valid species. 



9. Orthezia prcelonga. — Very abundant on leaves of croton (Hart). 



11. Asterolecanium aureum. — Mr. Hart sends me what I believe to be 

 the true A. aureum. It is quite distinct from A, oncidii, which Targioni- 

 Tozzetti recently described under aureum. 



