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[ ( )ctober 
longitudinal keel on its anterior half; tegulae piceous, with reddish margins; 
wings clear, almost milky, suffused with ferruginous towards the base; nerv'ures 
ferruginous, second s. m. oblique, rather broader than high, receiving the first 
r. n. about the beginning of its last third; legs black, with scanty pale hair, claw- 
joints ferruginous; spurs yellowish-white; middle and hind tarsi very long and 
slender; basal joint of hind tarsi flattened but very narrow, not hairy; abdomen 
black, the hind margins of the segments very broadly whitish-hyaline; first seg- 
ment with long dull white hair; the other segments with scanty pale hair, not 
forming definite bands, but apparently largely denuded; apical plate broad, 
deeply notched on each side; the usual four lateral spines; venter normal. 
Hah. — Arizona (precise locality not given), Aug. 1902 { F. H. Sni}<v, 1797). 
Very easily known from J/. confusa Cr. and M. microsiii-fa CklL, by the slender 
tarsi. 
Afclissodcs hexacantha, n. sp. 
S Length about ii mm.; black, rather robust; antennae comparatively 
short, hardly 7 mm. long; flagellum bright ferruginous beneath, except at base, 
but the apical margins of the joints narrowly darkened; third antennal joint 
more than twice as long as second; head and thorax with abundant light hair, 
whitish on face and beneath, pale ochreous dorsally, that on disc of scutellum 
and posterior disc of mesothorax black, but a band of ochreous between the black 
of mesothorax and scutellum: vertex with a very few black hairs at the sides; eyes 
pale greyish-green; facial quadrangle about square; clypeus strongly and 
extremely densely punctured, black, with a yelhno Iransversc band adjacent to the 
anterior margin-, labrum black; mandibles black, with a fulvous apical stripe; meso- 
thorax shining, with strong rather close punctures; scutellum also strongly 
punctured; tegulae shining black, with light ochreous hair; wings slightly dusky, 
with a yellowish tint; nervures piceous; second s. m. very large, not narrowed 
above, but oblique, receiving the first r. n. not far from its end; third s. m. 
narrowed more than half to marginal; legs black, with yellowish-white hair; 
small joints of tarsi becoming ferruginous; spurs pale reddish; hair on inner side 
of tarsi pale dull orange; abdomen rather broad, with yellowish-white pubescence, 
forming subapical band on segments 2 to 4, but no defined basal one on 2; hind 
margins of segments broadly brownish-hyaline; pubescence of fifth and sixth seg- 
ments chocolate-color; apical plate squarely notched at sides; last three segments 
spined laterally, the first pair of spines small, the second very large, the third 
slender. 
Hab : — Arizona (precise locality not stated), .\ug. 1902 {F. H. Snoie>, 447). 
