532 SUBFAMILY XII. COSSONIN^E. 



sensibly into typical concinnus. If the examination of the types prove 

 the two to be varieties of one species, the name impressifrons will have 

 priority. (Van Dyke.) 



833 (9027). COSSONUS COKTICOLA Say, 1831, 24; ibid, I, 291. 



Black or piceous, somewhat shining; antennae and tarsi chestnut brown. 

 Beak less than half the length of thorax, marked with dense elongate punc- 

 tures, basal portion shorter than apical, which is but slightly dilated; 

 vertex with a deeply impressed, elongate puncture between the eyes. 

 Thorax much longer than wide, sides almost straight from base to apical 

 third, then slightly converging to the feebly constricted apex; disc rather 

 coarsely and closely punctured, often with a narrow median smooth area 

 and a slight depression near base. Elytra elongate, parallel, somewhat 

 narrower than thorax, deeply striate, stria? more coarsely punctured on 

 basal half; intervals as 'in concinnus. Length 4 5 mm. 



Frequent beneath bark of pine in northern Indiana; very 

 scarce in the southern counties; June IS August 26. Van Cort- 

 land Park and West Point, N. Y. ; July. Newark, Spring Lake, 

 Lakehurst and Anglesea, N. J., under pine bark; April July. 

 Ormoud, Sanford, Dunedin and Sarasota, Fla. ; common beneath 

 bark of dead pine; Jan. 12 Apr. 11. Ranges from New England 

 and Canada to Missouri, south to Florida, Mexico and Guate- 

 mala, its normal food plant being pine. The Florida specimens 

 are smaller and paler than those from Indiana, being more often 

 piceous-brown than black. In addition to The very different form 

 of beak, corticola has the elytra less deeply and broadly striate 

 than in concinnus. The thorax is less convex, with smaller im- 

 pression near base and more sparsely and irregularly punctate 

 than there, and the median smooth line is better developed, being 

 sometimes nearly entire. The median groove of beak is longer 

 and much more distinct in concinnus, usually extending onto the 

 apical dilated portion. 



Y. MACRAXCYLUS Lee., 1876. (Gr., "large" + "curve.") 



Our only member of this genus is a slender-bodied, cylindrical 

 species having the beak stout, as long as head, not separated from 

 the front ; antennae inserted near the base close to the eyes, which 

 are round, not prominent, finely granulated; scape long, clavate, 

 reaching hind border of eye, first joint of funicle larger and 

 thicker, the others very short, wide, closely united; scutelluni 

 distinct; front coxre widely separated; tibi?e gradually dilated 

 and with a spine at inner apical angle; tarsi rather broad, the 

 last joint longer than the others united, claws large, divergent. 



