APHID PESTS OF MAINE, II. WILLOW FAMILY. 87 



66-04 and 67-04. Heavy infestation of winged and apterous 

 females on willow in front of Experiment Station Building 

 Sept. 9, 1904. This species proved such an annoyance to 

 people using the building that the willows were removed. 



6-07. Specimens received from Caribou, Maine, June 17, 

 1907, with the complaint that "they cover a limb and suck the 

 bark until it is dead and peels off." On Carolina Poplars and 

 Aspen trees. 



64-10. Apterous viviparous females and nymphs on Salix, 

 near Campus Greenhouse, new growth twig, Orono, July 18-25, 

 1910, 



95-10. Apterous viviparous females and nymphs numerous 

 along Salix stem. Orono, Aug. 18, 1910. 



126-10. Winged and apterous viviparous females numerous 

 on same willows from which 64-10 were collected. Sept. 15, 

 1910. 



26-13. Orono Popiiliis. June 2, 1913. Pupse, and migrants 

 ready for flight. 



35-13. Orono, June 5, 1913. Salix. Migrants occurring 

 singly with young. 



Melanoxantherium antennatum n. sp. This remarkable 

 species I have not met since 1908, and only the apterous ovipar- 

 ous females were seen at that time. However, this form is so 

 distinctive it seems unnecessary to wait longer for the winged 

 forms before presenting a brief description. 



The apterous oviparous female has a blackish head with 

 black eyes ; antenna blackish and with but 4 joints, HI with 

 single terminal circular sensorium ; (Fig. 43 D) prothorax 

 greenish brown ; tubercle lacking or inconspicuous ; entire leg 

 black ; abdomen hirsute ; incrassate clavate cornicles black upon 

 a yellow spot; (Fig. 45 E) dorsal surface of boc'y with a gen- 

 eral dark greenish brown coat or blackish ; ventral surface 

 greenish yellow. Ventro-lateral margin of abdomen with the 

 appearance of a longitudinal roll. 



103-08. Apterous oviparous females and eggs received from 

 E. No. Yarmouth, Maine, Oct. 31, 1908, with the statement 

 "we find a great many of these insects on and in a pump which 

 stands beneath an old willow." 



104-08. Apterous oviparous females received from Cherry- 

 field, Maine, Nov. 4, 1908. 



