214 S. FRANK AARON. 



third segment with its lateral margins short, a little sinuate, notch as deep as 

 broad, its angles less than 90° ; 2 teeth in claw ; 4 mm. long. 9 • 

 California, one specimen. 



OinalliS Iseviventris Cresson, Proc. Ent. Soc. Phila. iv, 303, 18fi5. 



Elampas Iceviventris Norton, Trans. Am. Ent. Soc. vii, p. 234, var. ci/- 



anescens. 

 Elampus ci/anescens Provancher, Nat. Can. xii, p. 303, 1881. 

 From Colorado (Mr. Cresson's type), California, New Hampshire and 

 Canada; also the type o^ cyanescens, in M. Provancher's collection, from 

 Canada. Three specimens from Colorado are larger than the type, one 

 specimen intermediate. One specimen from California is darker, no 

 green except on the face, and a slight reflection on the abdomen, inter- 

 mediate in size. Three specimens from Canada and two from New 

 Hampshire also grade in size, and vary slightly in depth of color, and 

 have the lateral margins of third segment less sinuate, -with the notch 

 not as deep ; these constitute the var. cyanescens ; thirteen specimens 

 in all ; from 4. .5-5.5 mm. long. 



Omalus siiiuosiis. 



Ifedi/chrum sinuosum Say, Macl. Lye. i, 82, 1828. 



Elampus Hinuosum Norton, Trans. Am. Ent. Soc. vii, 234. 



Hedyrhrnni jmuis Hald., Proc. Acad. Nat. Sci. Phila. ii, 55, 1844. 



Elampus purpurascens Provancher, Nat. Can. xii, 303, 1881. 

 Five specimens from Illinois (Mr. Norton's determinations), eight 

 from Colorado and one each from Montana and California ; also five 

 specimens in Provancher's collection from Canada, one of which is the 

 type of pu7'2>urascens. The specimens from Illinois, with two from 

 Canada, have the thorax bronzed and violet, with an absence of green or 

 blue to a more or less degree ; the Western specimens and the other 

 Canadian specimens are less bronzed and violet with green reflections, and 

 green on all the punctured areas, but I find in this character a great ten- 

 dency to vary ; some specimens from Colorado, and that from California, 

 having the punctured areas mostly blue, while in two Illinois specimens 

 they are slightly green or blue. Several Western and Canadian speci- 

 mens are dull dark blue with green reflections, having but a slight tinge 

 of violet on the abdomen, and in others with all violet reflections want- 

 ing entirely. The size of the Illinois specimens is from 3-5 mm., the 

 Canadian 4 mm., the Western specimens from 3-6 mm. long. 



Omalus corriiscans. 



Elampus corruscans Norton, Trans. Am. Ent. Soc. vii, 234, 1879. 

 Nine specimens in the collection from Canada (Norton's type), New 

 Hampshire and one from New Mexico (Norton gives Connecticut also). 



