14" AMERICAS COLEOPTERA. 



First ventral with a slightly curved, longitudinal, deeply impressed line extend- 

 ing backward from each coxa nearly to the hind margin of the segment, the 



surface adjacent declivous, so as to form a rather large excavation, which is 

 broader posteriorly. The following segments are each marked by a transverse, 

 subarcuate. suleiform impression. Front coxse narrowly but distinctly separated, 

 middle coxse distant by fully two-thirds their own width. PI. IV. fig. :\ I . 

 Length 1.4-1.6 mm. 



Hab. — New York; Canada (Ottawa— in pea straw— Fletcher : 

 Colorado. 



This species occurs in many parts of Europe, in Algeria, and is 

 said to be common in Mexico. The dozen examples before me ex- 

 hibit considerable variation in the width of the prothorax, the 

 depth of the discal fovea, and in the degree of coarseness of sculp- 

 ture c>f nearly all parts of the body. 



C elegans Aube.— Elongate, parallel, subdepressed. Head and prothorax 



densely, not coarsely punctate; the former very little longer than wide, evenly 

 convex : eyes small, situated at their own length from the hind angles, which are 

 right and narrowly rounded : labrum dilated at sides and inclosing the epistoma. 

 Antenna? passing slightly the middle of the prothorax. rather stout, joints :; S 

 about as wide as long, the outer ones a little wider and snbmoniliform : club 

 abrupt. 3-jointed. the joints of about equal width, the middle one transverse. 

 Prothorax subtrapezoidal, a little wider than the head and about as long as wide. 

 sides nearly straight and convergent from the front angles, the base a little nar- 

 rower than the apex; surface punctate like the head, a somewhat ill-defined. 

 longitudinal, submarginal impression. Elytra about one-half wider than the 

 prothorax. subparallel. sides feebly rounded, humeri tolerably well defined ; 

 each with eight rows of moderately coarse punctures: intervals narrow, the 

 third, fifth and seventh distinctly though not very strongly costiform through- 

 out. Beneath without fovea?, or impressed lines, coarsely, closely punctate 

 throughout, except toward the abdominal apex, which is nearly smooth. Front 

 coxse separated by about one-third their own width, middle coxse by nearly 

 their own width : hind coxal cavities attaining the sides of the body. First ven- 

 tral segment longer than the metasternum. and as long at sides as the two fol- 

 lowing united : segments 2-5 subequal. ,'P1. IV. fig. 35). Length 1.3 1.4 mm. 



Male. -Front and middle tarsi 2-jointed. 



Femaie.— Front tarsi normal. 



Hab. — Washington, D. C. 



A -mall number of specimens from the above locality are all that 

 I have seen from our territory. They vary in some trifling respects 

 from European specimens received from Reitter, but I have no 

 doubt of their identity. Elegans has been previously known only 

 from the Mediterranean region. 



The coarsely punctate under surface is seen elsewhere among our 



lies only in Adistemia watsoni, and the relation between these 



two is further evident by their near agreement in the peculiar sexual 



