THE CANADIAN ENTOMOLOGIST. 395 



blotches in the region of the cornicles, and the antennte are black to near 

 the base of joint 3. Other dark parts as in alate female. 



Length of body, 2 mm.; antenna, 5.2 mm. Joints of antenna as 

 follows, with small variations: III t, IV i, V. i, VI .17, VII 1.75 mm. 

 Fully two and one-half times the length of the body. I think this is the 

 longest antenna for length of body I have ever seen among the Aphididse. 

 Vertex barely convex between the frontal tubercles. Joint 3 with a very 

 large number (probably as many as ico) small transverse sensoria 

 occurring upon all sides, joint 4 with about half as many, and joint 5 with 

 20 or more, all upon one side. The young lice have capitate hairs. 



Except for the long cornicles, this species seems a close relative of 

 Drepanosiphum acerifolii, and it has the same general habits. The males 

 are specially given to jumping when disturbed, and the strange-appearing 

 oviparous females use their long drawn-out abdomen, which is suggestive 

 of an elephant's proboscis, with which to feel around in the crevices of tlie 

 bark of the trunk and large limbs for suitable places in which to deposit 

 their pale yellow eggs, which are placed singly or in small clusters. The 

 stem mothers in the spring also acquire wings as in case oi aceri/olii. 

 Egg laying begins about the first of October. 



The box elder seems to be the only food-plant for this species, and it 

 continues upon this food-plant throughout the season. 

 Callipteriis robinicc, n. sp. 



From leaves of black locust, Robinia pseudacacia. 

 Winged Viviparous Female. 



Described from specimens taken in Denver, Colorado, Sept. 3, 1907. 



A pale lemon-yellow or greenish-yellow louse, with red eyes. Distal 



ends of joints 3 to 7 of the antenna, tarsi, extreme apex of short beak and 



a spot near distal end of hind femora black, and a dusky spot in stigma of 



wing. No other dark markings. 



Length of body 1.6 to 1.8 mm. Length of antenna 1.6 mm., or 

 barely attaining tip of abdomen, and without hairs. Joints : III .60, IV 

 •381 ^ -34) ^^f • ' 4. VII .07 mm. Sensoria rather large, transversely oval, 

 closely placed, and about ten in number on basal one half of joint 3. 

 One l.irge sensorium near the end of joints 5 and 6. Abdomen smooth 

 except for a lateral row of small tubercles on either side. Subcostal vein 

 of fore wing moderately bent forward at base of stigma, second transverse 

 nerve moderately sinuate, nervures dusky-brown, costal nerve of hind wing 

 sliari 1)' bent downward to meet second transverse nerve, tlie transverse 

 nerves nearly straight ; cornicles tuberculate, swollen at base, ])rominent ; 

 Cauda knobbed. Head and prothorax broad, the latter without tubercles, 

 middle ocellus prominent, 



