OF WASHINGTON. 41 



olecz}. Dr. Howard said that he considered this an important 

 discovery, and this beetle's utility in combatting the Black Scale 

 should be tested, as no remedy for this pest had yet been found. 

 Prof. Smith remarked that Exochomus tripustulatus fed in some 

 numbers upon the San Jose Scale in New Jersey. 



Dr. Stiles called the Society's attention to the fact that the 

 Florida University last summer conferred upon Mr. Ashmead 

 the master's degree in recognition of the importance and excel 

 lence of his scientific work. 



Dr. Dyar showed a co-type of Chionobas katahdin, recently 

 described from Mt. Katahdin, Maine, by Mr. H. H. Newcomb 

 (Ent. News, XII, 206, 225, plate 12, 1901), presented to the 

 National Museum by Mr. Newcomb. With it specimens of 

 C. norna, its varietyy^//^, C. taygete and C\ semidea for com 

 parison, and a series of specimens collected by Mr. W. J. Peters 

 on the north side of the Koyukak river, Alaska. C. katahdin, 

 on the upper surface, does not differ from C. norna. Below it 

 is darker than norna, the band and strigulation more diffuse, 

 approaching semidea, and with distinct Sub marginal dots as in 

 the specimen of taygete shown. These so-called species seem 

 to be forms of one true species, as the series from Alaska indi 

 cates. This series shows xforms that may be referred to full a, 

 taygete, and semidea, yet they intergrade in a suspicious manner 

 as if they were but variations of one type. C. katahdin, how 

 ever, doubtless holds true to its own slightly divergent form in 

 its circumscribed locality, and it is a matter of opinion whether it 

 be referred to as an isolated local form or as a species. There 

 seem in any case too many names for the American forms of 

 Chionobas. C. katahdin is not the only form, collected from 

 an isolated locality, that has received a name. The following 

 table associates them in what may be a natural order. The last 

 ten "species" are very poorly separated and may have to be 

 ultimately united. The names of the species are following 

 Skinner's recent catalogue which differ somewhat from those on 

 Edwards' magnificent plates : 



