Catocala badia, G. &f R. 



The note on p. 3 on C niarmorata Edw. , I can parallel with another 

 on C badia, an insect more common, but withal very rare. A friend, 

 new in the work of collecting, was visited by me, and I spoke of the iin- 

 usualh- large series of C. hadia G. & R. , which he had in his otherwise 

 quite deficient collection. He told me he had obtained these on a visit 

 to a country place near Darien, Conn. He there had his first experience 

 in "sugaring." C badia came in great quantities to the "sugar." He 

 took a score or so of specimens, then knocked them away as a nuisance, 

 for he found they would not give Diasteria erechtea, Mamestra arctica 

 and such like any chance, and his collecting was a comparative failure be- 

 cause C. badia was so plentiful ! G. D. Hulst. 



Note on Dytiscus. 



There has been some doubt of the occurrence o{ Dyfiscus hybridus in 

 this vicinity (New York), a collector of great experience having informed 

 me it was restricted to the Lake region. I want to state that I found 

 last September in a little pond on Staten Island, 5 males and 2 females 

 (smooth). Not a single specmien o{ /ascivenlris was obtained from the 

 same pond, and only two verticalis were found in company with it. In 

 addition to the diagnosis of Crotch as to form of body, form and sculpture 

 of thorax, inner line of yellow elytral margin unbroken, Mr. Sharp 

 points out a difference in the hind coxal plates, which are sub-parallel, 

 while m /asaveniris they are divergent, the side angles nearly right. The 

 prosternal carina is more compressed. In these two characters verticalis 

 is intermediate. The color of the thoracic apex and base as well as of 

 the underside, is very variable, even in living specimens. 



The size of these three species Crotch gives as follows : verticalis 1.25 

 to 1.30 inches ; /ascivenlris 1.25 inches (should be 1.025); hybridus 1.8 

 inches (should be 1.08). This may be of interest to local collectors who 

 have no access to Sharp's monograph. M. L. Linell. 



Catalogue of the described species of South American 

 SYRPHIDiE. 



Additions and Corrections. 

 By S. W. Williston. 

 Baron Osten-Sacken has kindly communicated to me the following 

 list of additions and corrections to my Catalogue of South American 

 Syrphidaj, recently published in the Trans. Amer. Ent. Soc. , xiii, 308. 

 They were obtained from comparison with a catalogue of extra-European 

 Diptera compiled by him, which it is very much to be desired that he 



