No. 34-] HEMIPTERA OF CONNECTICUT: APHIDIDAE. 27 1 



Essigella Del Guercio. 

 E. pini Wilson. 



Ent, News, xxv, i, 1919. 



Apterous viviparous female: General color a light yellowish 

 green, with a series of rows of small brown spots on the abdomen. 

 The fore part of the body is quadrangular, while the abdomen 

 tapers to a point. The antennae are five-segmented. The ros- 

 trum of this species and of £. calif ornica are also quite distinct, 

 the terminal segment being crescent-shaped at the tip. The cor- 

 nicles are small and without the large cone-shaped base found in 

 most species of Lachnids. Length of body, 1.5 mm. 



Alate viviparous female: The antennae are five-segmented. 

 General color yellowish green; the thorax being brownish (?). 

 The abdomen is marked with a series of brown spots which occur 

 in longitudinal rows. The antennae are short and have five seg- 

 ments ; distal half of the third, and the fourth and fifth segments, 

 brown. The fifth segment is longer than the fourth and the 

 fourth and fifth together are slightly longer than the third ; third 

 segment with three and sometimes four roundish sensoria ; fourth 

 with one large one at the distal end, and the fifth with one large 

 and several small ones near the tip. The head is set with coarse 

 spines, six of which are set in front; similar spines are found on 

 the body. The antennae have a few inconspicuous spines widely 

 set apart. The legs are distinctly spiny but not as much so as in 

 Essigella calif ornica. The rostrum is short with the third and 

 fourth segments quadrangular and the terminal segment half 

 moon-shaped and not acutely pointed as in other species of 

 Lachninae. Wings long and narrow, front wing usually with the 

 median vein simple. The tibiae are short and rather stout while 

 in E. calif ornica they are longer and more slender. The cornicles 

 are but openings with thickened edges. The cauda is angular 

 with the tip elongated into a sharp nipple-like projection. 



Measurements: Length of body, 1.55 mm. Length of antennal 

 segments, iii, 0.21 mm. ; iv, o.i mm. ; v, 0.145 "^^- Total length, 

 0.6 mm. Length of wing, 2.33 mm. ; width, 0.9 mm. Length of 

 beak, 0.64 mm. Length of hind tibiae, 0.85 mm. ; hind tarsus, 

 o.i mm. and 0.145 mm. 



Food plants : Pinus strohus, P. virgiana, P. spp. 



Subfamily Aphidinae— Tribe CALLIPTERINI. 



By Arthur Challen Baker, Ph.D. 



The tribe Callipterini is composed of forms which live upon the 

 foliage and bark of plants. The species in many subtribes have 

 developed peculiar habits. Some are almost solitary whereas 

 others live in colonies. Some have developed the power of leaping 



