NORTH OF MEXICO. 395 



II. edwardsii, piceous with slight aeneous tinge. Head coarsely and rather densely punctured. Thorax 

 bro ider 1 1 ■ ra l"ir_'. moderately convex, rather finely punctured and more <\ usely at the Bides; apex sub-truncate, base 

 feebly rounded at middle, sides rounded in front, slightly sinuate and feebly narrower at base, margiu acute, not 

 broad, apical angles obtuse, hind angles rectangular. Propleurae coarsely and irregularly wrinkled and punctured, 

 mesostemum coarsely punctured. Elytra oblong; feeblj broader behind middle, Mj rounded 



erately convex, rather deeply striate, strisa not punctured, interspaces feeblj convex and sparselj punctulate. Bodj 

 li i rsely but not sparsely punctured, abdomen more densely punctured and at the — i » 1 « ■ -^ wrinkled. 



Length .<'>'- inch. 



Resembles a large specimen of califomicits, from which it may readily be distinguished 

 by the form of tin' thorax and tin' sculpture of the propleurae. The elytra arc also much 

 more deeplj striate. The antennas arc broken, but they appear to be as in cali/ornicus. 



For a single female specimen I am indebted to Mr. II. Edwards, of San Francisco, to 

 whom I with pleasure dedicate it. 



Collected in ( )regon. 



II. pernitens, Lec.,Proc. icad. 1861, p. 353. 



Thorax one-half broader than long, apex and base of equal width, the former truncate, 

 the latter feeblj rounded ; sides rounded, very distinctly margined, margin slightlj re 

 flexed. Antenna' slender, outer joints very feeblj decreasing, lasl joint elongate, some- 

 what longer than the tenth. Elytra rather broadly oval, finely striate, surface smooth and 

 polished. Propleurae finely wrinkled. 



Length . 10 inch. 



Oregon. 



II. ltetus, Lee, Proc. A.cad., Pacif. I!. I!. Rep. IX. A.pp. 1. p. 51. 



Thorax as in ealifornicus, hut rather more transverse. Margin broad, slightly reflexed 

 and broader than the hind angles. Antenna- with sub-equal joints, last joint rounded and 

 smaller than the tenth. Propleurae finely rugose. Elytra less rounded than in pernitens, 

 more deeply striate, and with the interstices feebly convex. Surface smooth, shining, cu- 

 preous metallic. 



Length .32 inch. 



Oregon. 



II. rugicollis, Lee, New Species, p. KM. 



With this species begins our series of apterous Helops. The very short robust an- 

 tennas serve to distinguish this species from those to which it has mosl resemblance in 

 form and other characters. The antennae are not longer than the head and thorax, re. 

 bust, outer joints compressed, last three shorter; joints nine and ten sub-triangular, 

 broader than long, last joint oval and shorter. The head and thorax are rather denselj 

 aciculately punctured, and reddish brown. Thorax slightly broader than Ion--, apex trun- 



