G8 BEETLES. 



retractile under the pro thorax. The scutellum is elongated 

 They live in running water, like the last genus. 



* E. ccneus, Miill. Shining black, with the wing-cases dark 

 bronzy, punctate-striate. The thorax is uneven, with raised 

 longitudinal strijTe on tlie sides of the back. Length, 2 mnu 

 It is common in brooks, at the roots of Scroijhularia aquatica^ 

 in which the larvae live. 



Family XXI. HETEROCERID^. 



Body rather elongated, pubescent. The head is long. 

 Antennae eleven -jointed, short, the first two points large 

 and triangular, with long hair, and the rest forming a club^ 

 serrated on the inner side. The tarsi are four-jointed. The 

 only genus is : 



Genus Heterocerus, Fabr. 



These beetles live in mud or sand on the margins of streams; 

 and lakes, and if the ground be pressed together with the 

 hand or foot they will come out of the holes which they 

 have dug. 



* IT. Icevijatus, Panz. (Plate YL, Fig. 35). This is an elon- 

 gated, somewhat flat, black beetle, with fine grey pubescence. 

 The legs are pale yellow; the base of the femora, the knees,, 

 and ends of the tibiae, blackish. The wing-cases are thickljr 

 punctured with yellowish stripes and spots. Local. 



* H. marginatus, Fabr. This is a rather convex black species,. 

 with fine brown hair. The lateral border of the pronotum, 

 wliich is finely punctured, is yellow. The elytra have traces- 

 of rusty-yellow spots at the base, and a curved rusty-yellow 

 spot on the shoulders. Length, 3-5 nmi. It is generally 

 found gregariously. Local, but fairly common near the coastc 



