368 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 45. 



ington, Louisiana; Onaga, Kansas; Kenosha, Nebraska. The col- 

 lecting dates range from June 19 to August 25. At Plummer's Island 

 Mr. Schwarz reports having taken it only on Rhus copalina. 



EUGNAMPTUS NIGRIVENTRIS Schaffer. 



This species seems to be peculiar to Arizona. Material is at hand 

 from the Santa Rita Mountains, Chiricahua Mountains, and Huachuca 

 Mountains, dated May 29 to June 19. It occurs in the canyons on 

 Quercus. 



EUGNAMPTUS CGLLARIS Fabrlcius. 



Schonherr designates three varieties of this species: 



var. a — black, thorax red. 



var. 13 — head above red, elytra nigrocoeruleous. 



var. f — nigrocoeruleous, head only red. 

 It has been found necessary to designate four varieties and names 

 have been given them because they have long been a source of puzzle- 

 ment to American students. There does not seem to be any name 

 directly applicable to the second or fourth varieties, and therefore 

 new names are proposed. The names ruficoUis Germar and ruhri- 

 coUis Say are both appUcable to var. collaris Fabricius. 



EUGNAMPTUS COLLARIS NIGRIPES Melsheimer. 



Entirely black, except elytra, head sometimes with red frontal spot. 

 Length 4.2-4.7 mm. 



Only females have been found to represent this variety. It is at 

 hand from Marion, Massachusetts; Lime Rock, Pennsylvania; Wash- 

 ington, District of Columbia; Plummers Island, Maryland; Afton 

 and Rosslyn, Virginia; Retreat, North Carolina; Nashville, Tennes- 

 see; Mobile, Alabama; Detroit, Michigan; Iowa; Missouri; Kansas; 

 and Dallas, Texas. The collecting season is according to these records 

 from May 15 to August. 



EUGNAMPTUS COLLARIS FUSCIPES, new variety. 



Body black, elytra bluish black, legs reddish, head sometimes with 

 red frontal spot. Length 3.5-3.7 mm. 



Two females are at hand from Kansas and Kimmswick, Missouri. 

 Males have been found at Marion, Massachusetts; Washington, Dis- 

 trict of Columbia; Plummers Island, Maryland; Rosslyn, Virginia; 

 Harper's Ferry, West Virginia; Nashville, Tennessee; Langdale, Ala- 

 bama; Detroit and Port Huron, Mchigan; and Kimmswick, Ms- 

 souri. The dates of collection range from May 19 to August. 



Type.— Csit. No. 14623, U.S.Nat.Mus. (Detroit, Mchigan). 



EUGNAMPTUS COLLARIS COLLARIS Fabricius. 



Body black, thorax red, elytra bluish black. Length 3.5-4.5 mm. 

 The typical form of this species is found in both sexes. The rec- 

 ords of occurrence are from Chicopee and Montgomery, Massachu- 



