5G THE CANADIAN ENTOMOLOGIST, 



the marginal vein about two-thirds the length of the marginal cell, or one- 

 half longer than the oblique first abscissa of radius. Petiole of abdomen 

 stout, two and a half times as long as thick, fluted. 



Hab. — Russell's Grove, Hull, P. Q., August 5, 1894. 



A NEW WATER- BUG FROM CANADA. 



BY WILLIAM H. ASHMEAD, WASHINGTON, D. C. 



The interesting new species of water-bug described below was received 

 some time ago from Abbe' P. A. Be'gin, of Sherbrooke, Canada. It was 

 captured swimming on a fresh-water stream some little distance above 

 Sherbrooke, and is of more than ordinary interest, from the fact that it 

 belongs to the genus Haiobatopsis, Bianchi*, a genus not yet recognized in 

 the North American fauna, and only recently characterized, being based 

 upon the South American Ilalohates platensis, Berg., also a fresh-water 

 species. 



Haiobatopsis Brgiiiii, n. sp. 



9. — Length, 2.3 to 2.5 mm. Oval, velvety black; a yellow dot or 



spot on middle of pronotum anteriorly, a larger,somewhat triangular,yellow 



spot, but more or less variable in shape and size, on the upper basal hind 



angle of the mesopleura close to the base of the metapleura, while 



beneath, the mesosternum anteriorly and posteriorly and along the median 



furrow or suture «is more or less broadly margined with yellow. Antennae 



scarcely two-thirds the length of body; the first joint subclavate, slightly 



curved, shorter than the three following joints united, but distinctly 



longer than joints 2 and 3 combined ; joints 2 and 4 subequal, longer 

 than the third, the latter being about three-fourths the length of the 

 second; the fourth or last joint is fusiform. The legs in all my specimens 

 are broken, but are similar to those found in Trepobates, Uhler { = Steph- 

 <?«/a, White), the middle legs being much the longest pair. The anterior 

 legs are very short, shorter than the body ; the femora, with their tro- 

 chanters, being about as long as the tibiae and tarsi combined ; the tarsi, 

 consisting of only a single joint, being a little longer than half the length 

 of tibiffi ; middle legs very long, their femora alone being as long or even 

 longer than the body, the tibiae being fully one and a half times as long 

 as the femora, ihe tarsi about half the length of tibije. The hind legs in 

 all my specimens are broken, but the femora, which alone remain, are 

 much slenderer and considerably longer than those of the middle pair. 



Hab. — Sherbrooke, P. Q., Canada. Dedicated to Abbe' P. A. Be'gin, 

 the discoverer of the species and a most valued correspondent. 



*.'\iin. Musre Zool. I'Ac.nd. Im|i, des Sci. de .Si, Peteislnirt;, 1896, p. 70. 



