(Page 636) 

 Key to Species. 



1. Elytra between suture and humeral rib with three dorsal ribs 2. 



Elytra between suture and humeral rib with only two dorsal ribs 3. 



2. Body feebly convex, thorax dull. L. 2.5 mm 1. [.'. porcatus F. 



Eody rather strongly convex, shorter; thorax and also abdomen glis- 

 tening. L. 2 mm 2. M. caelatus Er. 



3. lytra between ribs punctated. L. 2.5 mm 3. M. fulvus Er. 



Elytra between ribs not punctated. L. 1.5 mm.... 4. I.-, tesserula Curt. 



1. M. porcatus F. 



(Fabr. Ent. Syst. I, 2. 53C; Erichs. Kaf. Uk. Br. I, 646; iJen. Spec. 

 Staph. 911; Kraatz Ins. C. II, 1052; Thorns. Skand. Col. IV, 195; Pey BreVip. 

 1883, 156; ianjlh. KaT. M. II, 768). 



Identified especially by three dorsal ribs of elytra and dull thorax. 

 Deeply black, naked; thorax dull, abdomen somewhat glistening; antennae 

 with exception of the black distal knob, maxillary palpi, legs and a small 

 translucent spot on pronotal sides rust-red. 



The head with dense and rather fine scabrous punctation, middle-line 

 extremely finely carinated; pronotum (Fig. 193) twice as broaa as lonj. 

 with broadly set off, upturned or hollowly depressed, .and at bottom densely 

 ehagreened sides, posteriorly about as broad as elytia, side-margin at mid- 

 dle obtuse angular and pronotum from there forward narrowed, dorsum at middle 

 slightly convex and divided into several, 6-8, most often distinctly sepa- 

 rated, flat, scabrously punctated, cell-shaped foveae. Elytra nearly twice 

 as long as pronotum, and posteriorly transversally depressed, with rib-like 

 suture, three ribs on dorsum, one humeral rib from corner of humerus alonj 

 the side, and an arcuate side-rib outside of this, intervals between the 



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