260 GEO. H. HORN, M. D. 



The surface is sparsely clothed with short whitish hairs as is usu vl 

 iu the genus. Its special distinctive character is in the impression of 

 the head. 



Occurs from the Middle States to Texas and California, probably 

 introduced from Europe. 



M. TulTipes Mels. Proc. Acad, ii, 111; Lee. Proc. Acad. 1855, p. 305; 

 opaca Zieg. Proc. Acad, ii, 271. — Moderately elongate, black, subopaque, elytra 

 often paler, legs and antennae rufous. Head coarsely and densely punctured, 

 not impressed. Tborax longer than wide, narrower in front, sides straight and 

 finely crenate, anterior angles obtusely prominent, bind angles not prominent, 

 disc convex, coarsely and densely punctured, bi-impressed at base. Elytra 

 with striae of fine, very feebly submuricate punctures, nearly equal in size at 

 apex and base: Body beneath moderately coarsely and densely punctured, 

 abdomen less evidently punctured. Length .08 inch; 2 mm. 



This species resembles picipes but the head is not impressed. The 

 form of its thorax recalls that of productum. 



Occurs from Pennsylvania to Illinois. 



M. quadriroTeoIata Aube, Ann. Ent. Soc. France, 6, p. 468, pi. 17, 

 fig. 9 ; Motsch., Bull. Mosc. 1837, p. 115, pi. 7, fig. c— Elongate, ferruginous, sub- 

 opaque. Head coarsely and not densely punctured. Thorax as wide as long, 

 sides finely crenate, straight and very slightly divergent posteriorly, anterior 

 angles obtuse, not prominent, hind angles rectangular, moderately prominent, 

 disc coarsely and densely punctured and with four rather deep impressions, 

 the anterior and posterior on each side united by an intermediate groove. 

 Elytra rather finely submuricately punctured at base, punctures becoming 

 rapidly finer and more distant toward the tip. Body beneath moderately 

 densely punctured, abdomen less coarsely punctured than the metasteruum. 

 Length .08 inch; 2 ram. 



In the male the metasternum has a very feeble depression, the first 

 ventral more distinctly concave, the last ventral is simple. 



Occurs in the District of Columbia, (Ulke). 



M. americana Aube, Ann. Ent. Soc. Fr., 6, p. 461, pi. 17, fig. 5; Lee. 

 Proc. Acad. 1855, p. 305. — Moderately elongate, black, subopaque, antennae and 

 legs rufous. Head coarsely and densely punctured, not impressed. Thorax 

 distinctly wider than long, anterior angles obtuse, hind angles rectangular, 

 moderately prominent, sides subcrenate, straight, moderately divergent pos- 

 teriorly, disc convex, coarsely and densely punctured and with scarcely a trace 

 of basal depressions. Elytra rather coarsely submuricately punctured, punc- 

 tures somewhat finer at apex. Body beneath coarsely and moderately densely 

 punctured. Length .08 inch; 2 ram. 



The metasternum of the male is very slightly concave, the first ventral 

 more distinctly concave, the last ventral with an oval flattened space. 



Occurs from Pennsylvania to Illinois, Florida, Texas and Arizona. 



M. parallela Lee, Proc. Acad. 1855, p. 305. — Moderately elongate, black, 

 opaque, antennae and legs rufous. Head coarsely and denselj^ punctured, not 

 impressed. Thorax nearly square, sides parallel, angles not prominent, disc 



