116 GEO. H. HORN, M. D. 



appendiculate in the male. Body winged % , beneath and legs black, anterior 

 and middle coxae and bases of their femora yellowish. Length .14 inch; 3.5 

 mm. 



Occurs in California. Males only known. 



M. {Charopus) uniformis, Motsch. Bull. Mosc. 1859, iv., p. 405, 

 described from the female, may possibly be identical with this one. 

 The description applies quite well to what might be the female of 

 laticeps excepting that no mention is made of the very fine thoracic 

 yellow margin. 



M. lsevieollis, n. sp. — Elongate, bluish-green. Head shining, smooth, 

 front feebly impressed. Antennae black, four basal joints paler beneath. 

 Thorax broader than long, black with tinge of green, smooth shining, margin 

 at hind angles reflexed. Elytra parallel % , bluish-green, moderately shining, 

 surface finely scabrous, apex tinged with yellow, but not appendiculate. Body 

 beneath and femora black, shining, tinged with green, tibiae and tarsi piceous. 

 Length .14 inch; 3.5 mm. 



One specimen from Nebraska in the cabinet of Mr. H. Ulke, easily 

 distinguishable from all our species by the smooth and shining head 

 and thorax. The thorax is proportionately broader than any of our 

 species, unicolored, and the margin more broadly reflexed at the hind 

 angles. 



JI. mcereilS, Lee. (Charopus) Proc. Acad. 1859, p. 283; (MicroUpus) Class. 

 Col. N. Am. p. 192. 



This species resembles laticeps in color, sculpture and size, and dif- 

 fers in the thorax being somewhat larger, more narrowed behind and 

 truncate at apex with the basal angle yellowish. The tips of the 

 elytra are yellow and appendiculate in the males. The females are 

 apterous and the sides of the elytra diverge toward the apex. The 

 tips are broadly rounded not appendiculate nor yellow, and the surface 

 less rugose than in the males. Length .12 — .14 inch; 3 — 3.5 mm. 



Occurs in California. 



M. longicollis, Motsch. {Charopus), Bull. Mosc. 1859, iv., p. 41)5. Lee. 

 (MicroUpus) Class. Col. N. Am. p. 192.— Black, with slight tinge of blue, sub- 

 opaque. Thorax longer than wide, sides nearly straight, converging to base 

 which is nearly truncate, median broad band black, sides broadly rufous. 

 Elytra elongate parallel, at tip yellowish and appendiculate in the males, 

 broadly rounded in the females. Body beneath black, shining, with slight 

 seneous tinge. Length .14 — .lfi inch; 3.5—4 mm. 



One specimen of each sex is before me from Motschulsky, by whom 

 they were obtained from California. 



From the short descriptions given it may be seen that the following 

 table exhibits the differences between the species : 





