Runs in the couplet with severini in my key (Miridae of Illinois, 1941) but distinguished by black color on apical half of femora, base and apex of tibiae.

♂. Length 5.1 mm., width 2.34 mm. Head: width 1.12 mm., vertex .51 mm.; black, a small yellow glabrous spot each side of vertex bordering eye. Rostrum, lengt 1.08 mm., just reaching middle of mesosternum, yellowish, apical half blackish.

Through the kindness of Mr. Don B. Stallings, of Caldwell, Kansas, the author received for examination a small series of an Incisalia that appears to represent a race of the eastern I. henrici Grote and Robinson. This series was later augmented by about 40 more specimens from Mr. Stallings and 32 from an adjacent locality taken and sent by Mr. Robert Whittaker, of Eureka, Kansas. With this series it was possible to draw up a good description of the subspecies and to obtain quite accurate ideas as to the extent of its variation. In addition to this material, both Mr. Stallings and Mr. Whittaker sent further specimens for comparison, for which many thanks are due.

Antepenultimate Instar: Width of head 1.4 to 1.5 mm. Body 10 to 11 mm. in length and 1.5 to 1.9 mm. in width. Epicranial index 1.2 to 1.3. Ocelli 1 and 2 often contiguous but occasionally slightly separated. Crochets on ventral proleg number about 40.

Penultimate Instar: Width of head 1.9 mm. Body 12 mm. in length and 1.5 mm. in width. Epicranial index 0.8. Ocelli 1 and 2 contiguous. Crochets on the ventral proleg number 35.

A study of the caddis flies of Waskesiu Lake was carried out during the summer of 1940 as part of the general program of limnological investigations which have been conducted in Prince Albert National Park, Saskatchewan, since 1928. The importance of caddis flies in the ecology of the lake had been recognized since they provide much food for fish in the near shore reginn.