3hjriiiedonia.'[ STAPniLiNiDiE. ' 55 



in several cases that this is their iiivariahle liabitat : the first two species 

 differ considerably from -the others, and belong to the sub-genus ZyraSy 

 Stephens. 



I. Thorax niucli narrower than elytra with diffuse scat- 



tered punctures. 



i. Thorax black j elytra reddish testaceous with pos- 

 terior angles broadly darker ; length 7 mm. . . . M. Haworthi, Fifeph. 



ii. Tliorax red ; elytra black ; length 4 ram M. COLLAeis, Payk. 



II. Tliorax as broad or nearly as broad as elytra, closely 



punctured. 

 i. Thorax more or less strongly transverse, very finely 

 punctured, 



1. Antenna; with last joint as long as the three pre- 

 ceding together; hind body plainly punctured in 



front, nearly smooth behind M. LIMBATA, Payk. 



2. Antennae vvith last joint as long or hardly as long 

 as tiie two preceding together; bind body quite 

 smooth and shining. 



A. Thorax moderately strongly traus%'erse, 1^ times 



as broad as long; antenna; elongate. 



a. Upper surface entirely black, shining , . . M. FTTNESTA, Qrav. 



b. Upper surface pitch-brown with the shoulders 

 of elytra and more or less of hind body 



lighter, 

 a*. Basal segments of hind body entirely 



testaceous . . . M. humeealis, Grav. 



b*. Apex only of basal segments of hind body 



testaceous M. COaiHAlA, Maerk. 



B. Thorax very strongly transverse, twice as broad 



as long ; antennas shorter. 



a. Elytra broadly testaceous at shoulders . . M. LTJGENS, Grav. 



b. Elytra unicolorous, black or dark pitchy 



brown M. laticollis, Maerk. 



ii. Thorax snbquadrate, not much broader than long; 

 punctuation close, but deep and distinct; antennae 

 very long ; elytra reddish testaceous M. plicata, Er. 



Til. Haworthi, Steph. This is the largest and finest of our species ; 

 it is rather broad, finely and sparsely pubescent;, with head, thorax, and 

 hind body before apex shining black, and the rest of the upper surface 

 except the posterior angles of elytra (which are broadly dark) reddish 

 testaceous ; head much narrower than thorax, antennse reddish testa- 

 ceous with base lighter, moderately long and not stout, slightly thickened 

 towards apex, third joint longer than second, 4-10 gradually a little 

 thicker and shorter, 7-10 transverse; thorax broader than long, with 

 sides rounded in front and behind but almost straight in middle, with 

 very diffuse coarse punctures, quite irregular at sides, and formnig two 

 somewhat irregular rows on disc with a smooth space between ; elytra 

 considerably broader and hardly longer than thorax, very strongly and 

 coarsely punctured ; hind body long with the basal segments strongly n.i- 

 prcssed and the impressions strongly punctured, apex of segments almost 

 smooth ; legs test accous. L. 7 mm. 



