NORTH AMERICAN COLEOPTERA. 101 



According to Mannerheim (Bull. Mosc. 1853, iii, p. 220) this spe- 

 cies varies in having the elytra reddish brown, or the whole surface 

 of that color. A specimen in my cabinet from Washington Terri- 

 tory has the elytra reddish brown, the legs somewhat paler. The 

 species is feebly winged, as are all our species, even the ventricose 

 crchssa. jE. sahdeti is probably very closely related, but I have not 

 seen any specimens of that species. 



Occurs in Alaska and Washington Territory. Typical specimens 

 from Mannerheim have been examined. 



JE. lacustris Lee— Oblong, subcylindrical, convex, scarcely wider poste- 

 riorly, piceous, shining, legs brown. Antennae and palpi riifo testaceous. Head 

 moderately convex, coarsely not densely punctured, anteriorly verrucose. Cly- 

 peus semicircular, subtruncate and feebly emarginate at middle. Thorax nearly 

 twice as wide as long, very slightly narrower in front, sides feebly arcuate, ante- 

 rior angles subacute, posterior angles obtuse, but distinct; base arcuate, with dis- 

 tinct marginal line, the lateral margin and outer portion of base indistinctly 

 crenulate, disc moderately convex, a flattening near the front angles, two small 

 foveas on the declivity, the surface coarsely, but not densely punctured, near the 

 hind angles somewhat smoother. Elytra as wide at base as the thorax, humeri 

 distinct, but obtuse ; moderately deeply striate, strise coarsely and closely punc- 

 tured, intervals feebly convex, smooth. Mesosternum opaque, longitudinally 

 strigose. Metasternum smooth. Abdomen moderately shining, each segment 

 with a transverse row of punctures and others more numerous near the sides. 

 Posterior femora moderately stout, the tibiae relatively slender, obliquely tricari- 

 nate, the spurs rather slender and acute at tip. Length .18-.22 inch ; 4.5-.').5 mm. 



Varies in color in a manner similar to cylindrica. Closely allied 

 to the species named, but with the margin of thorax less serrate, the 

 median line not impressed posteriorly and the elytral intervals smooth. 

 The two fovese mentioned in the description are at the middle of the 

 declivous part of the sides, placed one above the other, the upper one 

 longer. 



Occurs in the Lake Superior region also at Garland, Colorado. 



Closely allied to lacustris, and possibly synonymous with it is a spe- 

 cies from Alaska described by Mannerheim in the following manner : 



jEgialia exarata: oblonga, modice convexa, subcylindrica, supra 

 piceo-castanea, subtus rufescens ; clypeo apice emarginato, margine 

 rufo, crebre ruguloso ; vertice subtiliter punctulato ; thorace trans- 

 verso, lateribus rotundato, ciliato, angulis anticis vix productis, ro- 

 tundatis, disco punctis paucis majoribus irregulariter sparsis, vei-sus 

 latera magis congestis ; elytris striis profiinde exaratis, in fundo leviter 

 crenulatis, interstitiis laevibus, humeris dente minuto acutiusculo 

 armatis. Longit. 2.33 lin. Latit. 1 liu. 



Habitat in insula Sitkha. 



