22(1 FAMILY IV. — TlYTTSOriMi]. 



A. erijthroptcrus Say. A. reticulatus Aube and A. ohtusatus 

 Say are members of the boreal .fauna known from IMassachnsetts to 

 Lake Superior and perhaps oceur in northern Indiana. 



436 (1433). Agabus anthkacinus Mann., Bull. Mosc, II, 1852, 304. 

 Oval, moderately convex. Black, subopaque; antenme, palpi and lej^s 



reddisli-broAvn. Upper surface everj'wliere finely and densely reticulate. 

 Elytra with a few fine scattered punctures toward apex. Prosternum dis- 

 tinctly widened behind the front coxse, subcarinate its full length. Front 

 and middle tarsi of male with distinct but small disks. Length G-7.5 mm. 



Ko.seiusko County; rare. Jtine 1. Taken from border of 

 sphagnum marsh. A boreal species ranging to Iltulson's Bay and 

 Alaska. 



437 (9300). Agabus coTsnaisris Gyll.. Ins. Suec. I. 1827, 511. 

 Oblong-oval, convex. Head, thorax and under surface black; elytra 



dark brown, polished ; antennjc, front legs and margins of elytra reddish- 

 brown; hind femora piceous. Elytra sparingly and irregularly punctate. 

 Length 8.5-9.5 mm. 



Lake and Laporte counties; freciuent lioncalh rubbish along the 

 shores of Lake ^Micliigan. IMay 5-November 9. 



438 (1411). Agabus seriatis Say, Trans. Anier. I'liil. Soc.. II, 182;!, 97: 



ibid. II, 511. 

 Oblong-dvate. subconvex. Black, slightly bronzed, shining; antenn.-e 

 and legs dark reddish-brown. Elytra very finely and closely reticulate, 

 with two or three dorsal rows of punctures evident but indistinct. Length 

 9-10 mm. 



Vigo and Fosey counties ; scarce. April 24-October 20. In 

 Vigo County taken from beneath stone in bottom of deep ravine. 



439 (1421). Agabus punctatus Melsh., I'roc. Phil. Acad. Nat. Sci.. II. 



1844, 27. 

 Short, ovate, convex. Head, antenn;e and legs reddish-brown; thorax 

 ■ ind elytra darker brown; under surface piceous. Thorax with sides nearly 

 straight, the margin distinct. Elytra with irregular dorsal rows of punc- 

 tures and numerous additional scattered ones on apical half. Outer simi' 

 of hind tibiae broad and large. Length 7.5-8.5 mm. 



Lake and Marion counties. March 14--June 4. Common in 

 woodland pond near Broad Ripple in early spring. 



440 (1417). Agabus stagnjnus Say, Trans. Amer. Phil. Soc, II, 1823. 100; 



ibid. II, 513. 

 Broadl.v o^■ate. sulideiiressed. Blaclv or ])ice(>ns. slightl.v l)ron7,ed aliove. 

 shining; under parts reddish-brown; vertex with two small reddish spots. 

 Sides of thorax but little rounded, strongly margined. Elytra very finely 

 reticulate, with an indistinct sul)niarginal yellowish stripe on apical ii;iir 

 and three rows of rather large ])unctures. Length 10 mm. 



