%llt €mdm\ %n\omk0. 



VOL. XXVI. 



LONDON, FEBRUARY, 1894. 



No. 



A CHECK LIST OF THE NEARCTIC COCCID^. 



BY T. D. A. COCKERELL, LAS CRUCES, N. MEX. 



It is ten years since Prof. Comstock published his list of North Ameri- 

 can Coccidae*, and as the work done since that time is scattered through 

 very various publications, it seems opportune to present a check list, 

 from which the student can learn precisely what species are now credited 

 to our fauna. 



All forms from America north of Mexico are included herein, but a 

 few Mexican species which perhaps belong rather to the nearctic than 

 neotropical region, are excluded. Species known to have been introduced 

 and which have no claim to belong to the North American fauna, are 

 placed within square brackets [ ]. Synonyms are in italics. 



ICERYA, Sign. ?[i3. D. iceryoides, Mask., 1891.] 



[i. 1. purchasi, Maskell, 1878.] Bergrothia, Kraaiz. 



2. I. rosse, Riley &' Howd., 1890. 



Cerococcus, Comst. 

 3. C. quercus, Comst., 1882, 



GossYPARiA, Sign. 

 [4. G. ulmi, Geoff.\ 



Eriococcus, Targ. 

 [5. E. azaleae, Comst.., 1S81.] 

 [6. E. araucarise, Mask., 1878.] 

 7. E. quercus, Comst., 1881. 



Dactylopius, Costa. 



?[S. D. adonidum, Linn., 1767.] 

 9. D. citri, Boisd. 



phyllococcus, Ashm., 1879. 

 destructor, Comst., 1881. 

 [10. D. longifilis, Comst., 1S81.] 

 ir. D. crawii, CoquilL, 1889. 

 12. D. ryani, CoquilL, 1889. 



14. B. townsendi, Ckll. 



Phenacoccus, Ckll. 



15. P. yuccse, Coquill, 1890. 



16. P. helianthi, Ckll. 



17. P. aceris, Geoff., 1762. 



Coccus, Linn. 



18. C. cacti, Linn. 



19. C. confusus, Ckll. MS. 



20. C. sorghiellus, Forbes. 



21. C. trifolii, Forbes. 

 Kermes, " Linn." 



22. K. galliformis, Riley, 1881. 

 Tachardia, Sign. 



23. T. larreai, Comst., 1882. 

 Orthezia, Bosc. 



24. O. americana, Walker. 



25. O. occidentalis, Dougl., 1891. 



2nd Rept. Dept. Entom., Cornell Univ. Exper. Station (1883). 



