No. 34-] HEMIPTERA OF CONNECTICUT I APHIDIDAE. "6$ 



radial sector. Cornicles medium small and light brown in color. 

 Cauda broadly rounded. Antennae slightly hairy, body and legs 

 with numerous long upright hairs of fine texture. Hind tibiae 

 moderately long but the tarsi quite long in proportion. 



Measurements : Length of body, 3.2 mm. Length of antennal 

 segments, iii, 0.5 mm.; iv, 0.187 mm.; v, 0.23 mm.; vi, 021 mm. 

 Total length, 1:1 mm. Rostrum, iii, 0.21 mm.; iv, 0.21 mm.; v, 

 0.1 mm. Total length, 1.5 mm. Length of hind tibia, 1.94 mm.; 

 hind tarsus, 0.1 and 0.5 mm. 



Food plant: Picea spp. 



New Haven, 14 May, 1909 (E. F. Coe). 

 D. gracilis (Wilson). Lachniella gracilis Wilson. 



Can. Ent, li, 20, 1919. 



Apterous viviparous female: Antennae light at the base and 

 shading to dusky at the tip. Front and middle pair of legs light- 

 colored except at the joints, third pair black except a small area 

 just beyond the base. Cauda dusky to black. Third antennal 

 segment approximately equal to the length of the fourth, fifth and 

 sixth segments together. Fourth and fifth segments approxi- 

 mately equal in length and the sixth shorter than the fourth. 

 Third segment without sensoria although a single small one was 

 observed on other specimens, fourth segment with one or two 

 sensoria and the fifth with two. Cornicles cone-shaped, and unusu- 

 ally large. Cauda rather more angular than rounded but with a 

 widely rounded tip. Hairs short and much more inconspicuous 

 at the base of the tibia than at the tip. Hairs at the base distinctly 

 upstanding, those toward the distal end semi-erect. 



Measurements : Length of body, 3.25 mm. Length of antennal 

 segments, iii, 0.46 mm. ; iv, 0.21 mm. ; v, 0.21 mm. ; vi, 0.145 mm - 

 Total length, 1.22 mm. Rostrum, iii, 0.25 mm.; iv, 0.187 mm.; 

 v, 0.063 mm. Total length, 1.86 mm. Length of hind tibiae, 

 2.45 mm. Length of hind tarsus, 0.31 mm. 



Alate viviparous female : Antennae light at the base of the third 

 segment but dusky at the tip and shading into color of other seg- 

 ments, the last one being nearly black. First and second pair of 

 legs dark to black except the greater portion of the tibiae. Hind 

 legs almost black throughout except a small dusky area near the 

 base. Antennal segments as in the apterous forms except that the 

 fifth segment is longer than the fourth. Third segment with six, 

 the fourth with two or three and the fifth with two large sensoria. 

 The cornicles are unusually large as in the apterous forms and are 

 volcano-like in shape rather than cone-shaped. The legs and 

 antennae are quite hairy and those on the base of the tibiae are 

 upstanding while those farther outward are reclinate. Cauda 

 angular but broadly rounded at the tip. 



Measurements : Length of body, 3.88 mm. Length of antennal 

 segments, iii, 0.52 mm. ; iv, 0.187 mm. ; v, 0.23 mm. ; vi, 0.166 mm. 



