A survey of the literature reveals no works concerned with the visual cells of the silverjaw minnow (Ericymba buccata), although Brown ( '36) has shown that this species, like many others, undergoes color changes in accordance with the ratio of incident and reflected light striking the eye of the animal.This study was undertaken upon the suggestion of Mr.Milton B. Trautman who is engaged in ichthyological studies of Ohio fishes. Mr. Trautman became interested in the eyes of Ericgmba, since his field observations indicated that this form is quite capable of withstanding considerable differences in silt content of the waters in which it lives. The following statement is abstracted from his letter of January 5, 1949: "The species is well distributed over Ohio and, therefore, somewhat tolerant of turbid water. However, it is abundant only in the clearest of the smaller streams which have plenty of sand and a moderate gradient. Ericymba seems to prefer to lie over clean sand and seemingly is quite phototropic. In a brilliant noonday sun when other species had retired to the shade, I have seen large numbers over bright white sand in clear water. Ericymba hides under 1Contribution from the Department of Zoology (no.

The following is a list of Hemiptera taken at Hudson Heights, Quebec, during the seasons of 1941 and 1942 between June 7 and September 21. Hudson Heights is located on the Ottawa River approximately nine miles west of where that river meets the St. Lawrence River, and approximately 80 miles east of Ottawa.

The following list enumerates the Hemiptera taken by me at Como, Quebec, which is about 3o miles westof l!{ontreal, from the rst of July to the 3rd of September, r9o6. All these iusects passed through the hands of Mr. E. P. Van Duzee, who kindly named them for me. The dates given are the first day the insect rvas seen or taken: I{rrBnoprrne. Pentatomidce. Corimelrena unicolor, P. B.-Aug. rg. Common on Golden-rod. Corimelaena pulicaria, Gertn.-July 24. Common on Golden-rod. Eurygaster alternatus, Say.-July 26. Several. Sehirus cinctus, P. B.-July 24. One specimen. Euchistus fissilis, IJhl.-July 26.-Several. Euchistus tristigmus, Say.-July z. Several. Pentatoma juniperina, Linn.-July zr.-One specimen. Mormidea lugens, Fab.-Aug. r. Several. Ccenus delius, Say.-Aug, 4. One specimen, Neottiglossa undata, Say.-July 26. Several, Cosmopepla carnifex, Fab.-July r. Commorr. Menecles insertus, Say.-July 26. One immature specimen. Banasa dimidiata, Say.-Aug. rz. One specimen. Podisus modestus, Dall.-Aug. r8. Elasmostethus atricornis, Van D.-Sept. r. Common. Coreida. AIydLrs eurinus, Say.-July zo. Several sweeping, Alydus .5-spinosus, Say.-July 26. Three specimens taken sweeping. Protenor Belfragei, Hagl.-Aug. z. Two specimens taken sweeping. Corizus noveboracensis, Sign.-July 27. Several sweeping. Corizus nigrosternum, Sign.-July 8 and Sept. 3. Several sweeping.

The Montreal Branch of the Entomological Society of Ontario, passed its seventy-fifth anniversay on October 16th, but did not hold a special meeting on that date as we had anticipated it at our annual meeting on May 15th and had previously invited the Parent Society to hold their annual meeting in Montreal as a Conunemorative Anniversary Celebration. When our invitation was accepted we were pleased, and we greet you here, and trust you will enjoy meeting with us at the three Institutions that have aided greatly in our pursuit of Entomology, namely, McGill University Université de Montreal and Macdonald College.

BY GEO. A. XIOORE, I{ONTRFJAL.