TflK \VATKI! SCAVKXdKH UKKTLUS. 251 



480 (1550). HELOPHORUS LIMEATI s Say, Jonrn. Phil. Aead. Nat. Sci., III. 



200; ibid. II. 128. 



Elongate-oblong. Above light brown with a greenish 

 tinge; elytra often with fuscous markings, of which an 

 inverted V on suture behind middle and two spots each 

 side are most obvious; antenna' and legs pale. Inter- 

 mediate sulci of thorax, deep, narrow, very strongly 

 curved or subangnlate near middle. Elytra 1 stria- with 

 deep, dilated transverse punctures. Length 2.8-3.5 mm. 

 (Fig. 124.) 



Throughout the State ; frequent. April 11-Oc- ' Fig m < 1Q 



tober 17. (Original.) 



481 (1540). HELOPHORUS LINEARIS Lee., Proc. Phil. Acad. Nat. Sci., 1855, 



357. 



Elongate, slender. Dull brownish-yellow ; head and thorax tinged with 

 greenish; elytra clouded with fuscous. Thorax one-half wider than long, 

 granulate; intermediate sulci feebly sinuate. Length 3 mm. 



Millers, Lake County; rare. May 2;\ Recorded from Buffalo; 

 New York, Nebraska and Canada. 



482 (1553). HELOPHORUS TUBERCUIATUS Gyll., Ins. Suec., 1X27. 



Elongate, convex. Dull black, tinged with greenish. Third elytra 1 in- 

 terval with i'our elevations, the basal one oblong: iifth and seventh each 

 with three. Length 3.5 mm. 



Beneath rubbish close to water on beach of Lake .Michigan, near 

 Pine and Millers, Lake County; scarce. April 23-June 24. 



II. HYDROCHUS Leach. 1817. (Gr., "relating to water.") 



Thorax much narrower than elytra, its breadth being equal to or 

 only slightly exceeding the length; disk usually marked with small 

 cups or fovea 1 . The following species have been taken or may oc- 

 cur in the State. 



KEY TO INDIANA SPECIES OF HYDROCHL.S. 



<i. Larger. 5.5 mm.; elytra with intervals flat and much wider than stria-. 

 the fourth with large oblique tubercles. SCABRATUS. 



mi. Smaller, not over 4.5 mm.; intervals convex. 



l>. Thorax with rive more or less distinct fove;e or cup-shaped impres- 

 sions. 

 r. Strife of elytra as wide as or wider than intervals; thorax with 



granules between the punctures. 



(I. Sides of thorax distinctly sinuate near base, not crenulate; 

 length 3.8-4 mm. 483. SQi'AMtFER. 



<1<1. Sides of thorax finely creuulate. 



e. Smaller, not over 3 mm.; sides of thorax subsimiate. 



484. IN.KQVALIS. 



