379 



Hamden, Conn., from black knot galls on cherry, taken April 23, 



1915, by G. C. Graham, fifteen specimens, slide no. 27G9. 

 Sandy Hook, Conn., oak leaves from hemlock gorge, taken June 



21, 1926, by Jacot, one female, slide no. 2612. 

 Stevenson, Conn., one mile south of, from ground or bush. 

 Juniper, old pasture, taken May 20, 1920 by Jacot, eighteen 



specimens, slide no. 2012o; and from red cedar {Juniperus 



virginiana), same place and time, twenty-five specimens, slide 



no. 2013ol. 

 East Village, Conn., one mile west of, beaten from leaves of Hop 



Hornbeam {Ostrya virginiana), pasture, taken July 5, 1920 by 



Jacot, one female, slide no. 2020o. 

 Long Island, N. Y., on cedar, taken August 20, 1927, by J. A. G. 



Davey, three specimens, slide no. 29G1. 

 Sea Cliff, Long Island, N. Y., from cedar and peach trees, taken 



by Nathan Banks, forty-eight specimens on slides 26B33a and 



b; and thirteen specimens on slides no. 26B107b, c, d. 

 Queen's Woods, Long Island, N. Y., from crevices of bark on 



white ash {Fraxinus americana), taken May 3, 1919, by Jacot, 



five specimens, slide no. 1929o. 

 Georgia, coll. by (J. C?) Bradley, five specimens, slide no. 



26B109. 

 Niles, California, November 1, 'C. J. Pierson from Essig,' six 



specimens, slide no. 26B110. 



A comparison of this material with the thirty-one specimens 

 kindly sent me by Dr. Oudemans and two from Silkeborg, Den- 

 mark (slide no. 26B112) leads me to the conclusion that the 

 American material differs enough to warrant the use of a tri- 

 nomial and its recognition as a geographic race. It would there- 

 fore be known as 



Humerobates humeralis arborea, subsp. nov. 



Characters. — Size smaller than European species (see above, under dimen- 

 sions); pseudostigmatic organs bent mediad at juncture of pedicel and head 

 so as to make this organ (as seen from above) quite curved (figures 12- 

 14), the head seems shorter and more obhque than the most extreme European 

 specimen. Anal aperture with anterior margin much less sloping, sides also 

 less converging. In Plate 19, figure a, the condition found in the European 

 race is depicted by a broken line, in the American by the solid line. The 

 bristles of the ventral plate seem to be identical. At least any subspecific 



