J^899] ENTOMOLOGICAL NEV.'S. 93 



d. variety- trifasciata. 



I am not a '' lumper," and so do not believe in the establish- 

 ing of varieties except where the evidence is very unusual. I 

 have series of hundreds of specimens in this group from va- 

 rious localities, and these are now in the National Museum, 

 where they may be examined by students. I consider color 

 as not of specific value here, and the slight variations (real, 

 not apparent) in form of last ventral segment of varietal value 

 only. The color varies from green (aureoviridis and obtusa) 

 through yellow and brown {clypeata to entirely black above 

 (livingHtonii ) . The size varies from rather small in unicolor to 

 large in anteovlrklifi, which is one of the largest Typhlocyhida 

 These names represent geographical varieties, ranging from 

 the East (represented by the forms of oft<j/s«), through the 

 Rocky Mountain region ( represented by the clypeatu and aure- 

 oviridis forms) to the Pacific coast (represented by clypeatu and 

 lirinffstonii). Specimens approaching typical smaragdula are 

 found throughout the United States, which is a significant 

 fact. Trifasciata iH paralleled by rirdii and a variety of pnra 

 with smoky marked elytra. 



All the species of group II need further study, and I would 

 recommend that entomologists all over the West sweep Ar- 

 temisias especially, thoroughly, and not to pause until they 

 have laid in series of hundreds of specimens of the specias 

 found on these and other Western plants. 



Atrolabes and similis are synonymous with spJendida, which 

 is a common species in the South. Similis is entered in Gil- 

 lette's table, but I find no description of it in the text. I 

 have seen the tj-pes. 



The types of pallida were collected in 1879 and are totally 

 decolored by their twenty years' experience in collections. I 

 have swept the cotton plant in various parts of the South and 

 have found on it only EmpoaHca flavescens and Dicraneura uni- 

 puncta. Other than on the color, or rather lack of color, I 

 cannot separate pallida from flavescens (compare Gillette's de- 

 scriptions and figures). Mexicana and viridescenH are insep- 

 arable in large series, running one into the other. 



Mr. Gillette mentions my original specimens, which he 

 agreed with me was j>w/-«, yet he describes snowi, the descrip- 

 tion of which is very good of the original specimen of pura. I 



