146 Bulletin of the Brooklyn Entomological Society Vol. XV 



sides of the thorax are light in color, whereas the lapponica of 

 Europe has the thorax unicolorous, the same as in tremulce. They, 

 however, according to Crotch's table in the Proceedings of the 

 Academy of Natural Sciences of Philadelphia, Vol XXV, p. 52, 

 1873, all belong to the same group being " Elongate, sides of 

 thorax-thickened; claw- joint not dentate beneath." Crotch con- 

 sidered interrupta the same as lapponica, but this does not now 

 appear to be the case. 



The finding of a male and female of these two species in 

 copulation in a state of nature, before they were confined in the 

 bottle, is of much interest, and suggests an opportunity for future 

 work in the genus Melasoma. 



While Melasoma interrupta has long been known from a wide 

 range of localities in the United States, tremulce has apparently 

 been spreading southward. Crotch says of the latter species in 

 1873, " it is very common in Europe, and has been sent from 

 Hudson's Bay." The species was not mentioned in the second 

 (1900) edition of the New Jersey List, but is recorded in that of 

 1910 from "Anglesea VI, 12, one specimen (Boerner)." The 

 writer collected a single specimen at Newfoundland, N. J., July 

 6, 1907, and has also found it in the Adirondacks, June 22, and at 

 West Point, N. Y., in June, 1912, and June, 1914. Other Nev/ 

 York State specimens are from shore of Lake Ontario near 

 Pulaski, Groton, Batavia, Honeoye Falls, Conesus Lake, and Rock 

 City, Cattaraugus Co., all collected in June, and Queens, Long 

 Island, without date. On Staten Island, N. Y., it has been col- 

 lected at Watchogue, July 2, 1916. Also collected at Black Pond, 

 Fairfax Co., Va., near the Potomac River, where two individuals 

 were found June 21, 1914. In the collection of Mr. Charles W. 

 Leng there are specimens from New Hampshire, and Aweme, 

 Manitoba (N. Criddle). 



As a matter of interesting distribution of a related species, the 

 writer can record the capture of two specimens of Gonioctena 

 arctica Mann., at Derrick City, Pa., near the N. Y. state line at 

 Olean, Cattaraugus Co., on June 6, 191 5. In the north it is more 

 common and we have the species from Mt. Washington, N. H. 

 In Mr. Leng's collection there are specimens from Sudbury, On- 

 tario ; Duluth, Minn., and Telegraph Creek, British Columbia. 



