PTEROSTICHIN.E 323 



Prothorax coarsely margined but not so evenly as in Euferonia, the re- 

 flexure gradually broad and obsolescent posteriorly, the hind angles 

 obtuse; body resembling Euferonia in general appearance, though 

 less convex, differing much in having the elytral striae unevenly 

 broken throughout and the apex more obtuse; it differs further in 

 having pronounced male modification of the abdominal apex; dorsal 

 foveae traceable in the confused sculpture only by the attendant 

 setae, which are apparently two or three in number. Atlantic boreal 

 regions. [Type Pt. punctatissimus Rand.] Lyperopherus Mots. 



16 Habitus strongly suggesting Euferonia, the body shorter, broader, 

 less convex, with opaque lustre and with more oblique sides of the 

 prothorax, the angles and foveae nearly similar and the sides simi- 

 larly coarsely margined; head larger, the palpi normal; striae deep, 

 impunctate, the scutellar rather well developed; dorsal punctures 

 four. Atlantic regions. [Type Per. mcesta Say] Refonia nov. 



Habitus recalling Myas but much flatter, with the prothorax not narrowed 

 at base, the foveae large, deep and irregularly duplex, the thoracic 

 sides coarsely margined, palpi slender; integuments polished through- 

 out, the striae deep, the scutellar deep but only moderately long; pro- 

 sternal process margined or not. Atlantic regions. [Type Per. 

 permunda Say] Abacidus Lee. 



Habitus nearly as in Ferestria; body small, ventricose to subparallel; pro- 

 thorax finely margined at the sides, which are oblique posteriorly, 

 the angles obtuse or minutely and acutely prominent, the foveae 

 single; elytral striae deep and punctured, more or less obliterated at 

 the sides and tip; abdomen with conspicuous coarse punctures ex- 

 cept axially. Atlantic regions. [Type Per. ventralis Say] 



Gastrosticta nov. 



Habitus somewhat as in the more minute exponents of Argutor; body 

 alwavs notably small in size, including some of the smallest of the 

 subfamily, elongate, moderately convex; palpi slender, the antennae 

 rather thick; prothorax finely margined at the sides, sinuate before 

 the sharp basal angles, the foveae single or double; striae not deep as 

 a rule, feebler externally, the scutellar imperfect; dorsal punctures 

 becoming variable, two to five or six in number. Species numerous 

 in the far north, especially in the Pacific districts of both hemi- 

 spheres. [Assumed type Pt. hudsonicus Lee.] Cryobius Chd. 



Habitus in some respects as in Piesmus, apterous, small in size; prothorax 

 trapezoidal, finely margined, the foveae single, linear; seventh ely- 

 tral stria subobsolete anteriorly, deep posteriorly; body rather de- 

 pressed. Male with the abdomen impressed and tuberculate at apex. 

 Atlantic regions. [Type Pt. lubricus Lee.] Paraferonia nov. 



17 Dorsal punctures of the elytra two in number; body subparallel, the 

 integuments highly polished; head moderate, the palpi normally 

 slender; prothorax coarsely margined at the sides, which are oblique 

 posteriorly, the angles obtuse, the foveae single; elytral striae very 

 coarse, deep and strongly punctured. Atlantic regions. [Type Per. 

 submarginata Say] Piesmus Lee. 



Dorsal punctures three, small as usual 18 



