H. C. FALL. 143 



serrate, all the joints longer than wide ; elytral apex rounded, pale 

 reddish yellow. Length 4-5 mm. 



Bitter Root Mountains, Montana. Three d^s ; four 9 s. 



In form, size, and sexual characters this species is almost 

 precisely like uniformis {vide supra), the pale thoracic mar- 

 gin and the pale elytral apex of the female are, however, 

 wanting in the latter. 



M. viridulus n. sp. 



Slender, slightly wider behind, more obviously so in the female, 

 rather dark metallic green throughout, the elytra more rarely dark 

 blue or blue-green ; epistoma, antennal tubercles and genae pale yel- 

 lowish-white ; pubescence sparse, rather long, grayish. Antenna? (c?) 

 half the length of the body, rather strongly serrate, joints 3-5 about 

 as long as wide, following joints a little longer than wide. Head and 

 prothorax highly polished, very minutely remotely punctate. Pro- 

 thorax a little transverse, sides feebly arcuate and moderately conver- 

 gent in front, broadly rounded behind, without trace of base angles. 

 Elytra moderately shining, surface a little irregular and subscabrous, 

 punctuation somewhat coarse but vague, not very close; apices not 

 at all appendiculate in the male. Length 3-4 mm. 



Mt. Wilson, Southern California. 



This species occurs abundantly on the flowers of Ceano- 

 thus on or near the summit of the Sierra Madre Mountains 

 in June. It may be at once distinguished by its rather small 

 size and entirely green color. Of the described species two 

 only — <znus and biguttulus — agree with it in having serrate 

 male antennae and non-appendiculate elytra. The females of 

 viridulus differ only in their slightly less parallel form, and 

 shorter and narrower antennae, the joints after the second all 

 longer than wide. 



M. bakeri n. sp. 



Male. Form moderately elongate, parallel, black, faintly aeneous, 

 prothorax pale reddish-yellow with broad black median stripe, elytra 

 with pale tip, legs black, hind tibiae pale in apical two-thirds; pubes- 

 cence pale, fine, sparse. Antennae reaching the middle of the elytra, 

 strongly pectinate, the branches of joints 3 and 4 about half as long 

 as those of the following joints, those of 7 and 8 slightly longest and 

 about one-half longer than the joints themselves. Head and prothorax 

 strongly shining, the former sparsely punctulate, the latter transversely 

 oval, broadly impunctate on the disk, a few fine punctures laterally. 

 Elytra finely rugulose, vaguely finely punctate, sides slightly dilated 



TRANS. AM. KNT. SOC, XXX VI. JUNE, 1910. 



