^Ir. T. I). A. Cockerell on Coccidae. 453 



AiCLiiifES. For tlio jiresent I will refer here A. punctalus 

 ((3kll.), A. Toicnsendi (Ckll.), A. moniUs (Ckll.), and 

 the Australian A. levis (Mask.) and A. pitigais 

 (Mask.). 



EuLECANivM EugenicB (Hempel). A surprising reference, but 

 I do not see what else to do with the species. 



Saissetia discoides (Ilenip.), S. dura (Hemp,), S. ylanulosa 

 (Hemp.), S. zanthoxylum (Hemp.). 



EucALTMNATUS gracilis (Hemp.), E. hrunfelsice (Hemp.), 

 E. tessellalus (Signoret). 



The above attempt to classify the American (particularly 

 Neotropical) Lecaniines must be regarded as more or less 

 provisional. In the Coccida3 tlie adults often show the closest 

 possible resemblance, when the larvae indicate that (here is 

 only the remotest real relationship. In order to construct a 

 jierfectly satisfactory classification one should possess ail the 

 stages and both sexes of every s|)ecies*. This of course is 

 out of the question at present, and I had shirked the work of 

 grouping the species, referring them, as did others, to the old 

 genus Lecaniinn, wiiich was made to expand indefinitely to 

 suit our convenience. Just now, however, Mrs. (". H. Fernald 

 is about to bring out a bibliographic list of all known Coccida3, 

 while 1 have undertaken to revise the genera for Wytsman's 

 'Cienera Insectorum '; so it becomes absolutely necessary to 

 place the species one way or another. This necessity becomes 

 even greater because of the discovery that Lecanium has to 

 be abandontd in favour of the prior Culgmnatus and the 

 undesirability of referring all the species to the latter genus, 

 making a lot of binomials which are certain not to stand. 



DACTYLOnus, Costa (1836?) t- 



Tlnouizh the kindness of Mr. C. D. Sherborn and Mrs. C. H. 

 Fernald 1 have been able to obtain full j)articulars regarding 

 this genus, which has been altogether misunderstood by 

 authors. Dactylojnus, Costa (' Fauna del Regno di Napoli,' 



* For example, my genus rseudoh'cmiium was considered an aberrant 

 Dactylopiiue, only the larva and adult female being known ; but Mr. Ku- 

 wana has lately described \.\w various stages, including the male, and 

 Mr. E. E. Green, after studying Kuwana't; tigiues, has reached the con- 

 clusion that i'dfj^rio/^Tflw/KWi is identical with the aberrant Lecaniine genua 

 Aclerda, iSignoret. Wlieu I learned this from Mr. Green I was much 

 surprised, but, after going carefully over the ground, I am sure that he is 

 correct. 



t The date of Dactylopius has been given as 18.35. Mr. Sherborn 

 writes : " date unknown, possibly 1836." 



