NO. 1124. 



R E VISION OF THE ME LA NOPLISC UDDER. 121 



is more or less, generally slightly, convex, is rarely at all flaring in 

 front or only in the very slightest degree, at most faintly punctate and 

 generally distinctly longer than the metazona; front margin generally 

 truncate or subtruncate, hind margin obtusangulate to a greater or less 

 degree, rarely subtruncate; median carina always distinct on the meta- 

 zoua, generally much less so on the prozona, often subobsolete between 

 the sulci and never wholly wanting; lateral carinae typically obsolete, 

 but often indicated by a distinctly abrupt though rounded shoulder, 

 rarely becoming carinate; lateral lobes vertical or sub vertical, espe- 

 cially below, often feebly tumid above on the prozoua, and generally 

 marked by a piceous postocular band, crossing either the prozoua alone 

 or the whole pronotum, not infrequently broken or maculate. Proster- 

 nal spine variable, but always prominent; meso- and metastethia to- 

 gether distinctly longer than broad in both sexes; interspace between 

 mesosternal lobes generally longer or much longer than broad, never 1 

 in the least broader than long, even when the sides of the interspace 

 are very divergent posteriorly (male) or generally quadrate but more 

 variable than in the other sex, sometimes as narrow as there but more 

 frequently subtransverse, occasionally in brachypterous forms dis- 

 tinctly transverse, as a general rule wider than in the other sex (female), 

 in both always distinctly, generally much, narrower than the lobes them- 

 selves, except in the few instances 2 where it is distinctly transverse in 

 the female; metasternal lobes generally attingent or subattingeut, 

 rarely only approximate (male), or generally approximate or subap- 

 proximate, the interspace between them generally narrower than the 

 frontal costa (female); metasternum rapidly narrowing posteriorly, so 

 that the portion behind the lobes is not, or is hardly more than, half 

 the greatest width of the metasternum, but is more than twice as broad 

 as long. Tegmina always present, but either abbreviate and then 

 lateral, attingent, or overlapping, sometimes shorter and sometimes 

 longer than, but generally nearly the length of, the pronotum and usually 

 more or less acuminate apically; or they are fully developed and then 

 usually about attain or a little surpass the tips of the hind femora, 

 tapering more or less but very gradually and apically well rounded, at 

 a distance from the apex equal to the breadth of the tegmina dis- 

 tinctly narrower than the metazona, the intercalates and cross veins 

 of the discoidal area (except in the macropterous forms of the dimor- 

 phic species, M. dawsoni and M. marginatus) relatively numerous at 

 least in the apical fourth arid usually throughout, the venation in gen- 

 eral sharp and clearly defined, the humeral vein straight and only api- 

 cally arcuate, nearly always terminating either on the apical margin 

 or only a short distance before it, running for some distance almost 

 exactly parallel to the costal margin or merging insensibly into it, the 



1 In two species, M. montanus and M. borealis, it is feebly transverse, but much 

 narrower than the lobes, and is similar in the two sexes. 

 * These are M. artemisiae, M. milHaris, and J/. altitudinum. 



