Sept., I9I2.] Matheson : Haliplid.'E of North America. 175 



posterior margins ; last abdominal segment triangular in outline, sparsely 

 punctate. 



Elytra with ten rows of punctures, the anterior part of outer two rows 

 of same color as elytra, the others black ; between the third and fourth rows 

 is a partial row interrupted by the anterior black spot ; apical margins 

 sinuate-truncate. 



Habitat. — Ont. ; Mass. (Amherst); New York (Ithaca, Golden, 

 Pike) ; Mich. (Lansing) ; Indiana (Lake Laporte, Marshall and 

 Fountain Cos., Blatchley, 1910) ; 111. (Lake Forest, J- G. Needham. 

 Beach, 111.) ; Iowa (Iowa City, H. F. Wickham) ; Wis. (Dane Co., 

 H. F. Wickham and Wm. S. Marshall) ; Kansas (Leconte). 



Type— In the ]\Iuseum of Comparative Zoology, Cambridge, Mass. 



Peltodytes duodecimpunctatus Say. 



Cnemidotus duodecimpunctatus Say. Trans. Amer. Phil. Soc, II, 1S25, p. 106. 



General color pale yellow to reddish-yellow with black markings on 

 pronotum and elytra. Length 3.5-4 mm. 



Head punctate ; labrum not emarginate ; a row of setse on its anterior 

 margin ; antennae testaceous. 



Pronotum with two basal black spots, punctate ; punctures of same color 

 as pronotum ; punctures of front and sides smaller than those of base. 

 Prosternal ridge margined, grooved ; constricted in the region of the pro- 

 thoracic legs, widening anteriorly, punctate, steeply declivous in front. 

 Posterior coxae angulate on hind margin ; punctate ; reaching the last segment 

 of abdomen. Last abdominal segment triangular in outline, impunctate except 

 on apical margin. 



Legs pale yellow except the femora of the hind legs which are dark 

 brown ringed with yellow at their distal ends. 



Elytra, each with ten rows of punctures ; intervals with a few scattered 

 punctures ; black spots and margins arranged as shown in Plate V. Apical 

 margins of elytra strongly sinuate-truncate. 



//ofcifof.— Canada (Ont. & Que., H. F. Wickham) ; New York 

 (Poughkeepsie, Flushing, L. I., Ithaca) ; Indiana (Blatchley, 1910) ; 

 111. (Lake Forest, J. G. Needham); Wis. (Dane Co., Wm. S. Mar- 

 shall) ; Pa. (South Western, Hamilton, 1895) ; Kentucky. 



Peltodytes pedunculatus Blatchley. 



Cnemidotus pedunculatus Blatchley. Coleoptera of Indiana, 19 10, p. 204. 



General color pale yellow with black spots on pronotum and markings on 

 elytra. Length 3.5 mm. 



Head closely and finely punctate ; labrum not emarginate, a row of fine 

 setae along its anterior margin, rounded at sides ; antennae pale yellow ; eyes 

 nearly circular in outline. 



