262 CONNECTICUT GEOL, AND NAT. HIST. SURVEY. [Bull. 



dusky except at the base; frontal tibiae almost entirely black, 

 middle and hind tibiae about one-third yellowish. Antennae long 

 and slender, third segment approximately equal in length to the 

 fourth and fifth. Fourth segment slightly longer than the sixth, 

 but shorter than the fifth. Third antennal segment with seven 

 medium-sized sensoria. Fourth segment with two small sensoria, 

 one near the middle and the other at the distal end ; fifth with two, 

 as in the fourth segment but the distal one is extremely large. 

 Cornicles volcano-shaped. Rostrum extending to the cornicles. 



Measurements : Length of body 3.9 mm. Length of antennal 

 segments, iii, 0.70 mm. ; iv, 0.3 mm. ; v, 0.4 mm. ; vi, 0.27 mm. 

 Total length 1.97 mm. Length of hind tibiae, 1.7 mm.; hind 

 tarsus 0.23 mm. and 0.37 mm. 



Food plant: Pinus sylvestris. 

 D. pinicola (Kaltenbach). Lachnus pinicola Kaltenbach. 

 Lachnus abietis Fitch. 



Mon. der Pflanz., 154, 1843. 



Apterous viviparous female: General color, light cinnamon- 

 brown. Abdomen with four longitudinal rows of small black 

 spots. The abdomen covered with a light coating of white wax. 

 The waxy coating is more abundant in the younger stages. Legs 

 and antennae dusky to black, and with the third segment longer 

 than the fourth and fifth together. Third and fourth and fifth 

 antennal segments with a single round sensorium at the distal end 

 of each. Sixth antennal segment long and finger-like. Hairs on 

 body long and fine. Those on all of the legs are distinctly upright. 

 Cauda broad and somewhat flattened at the end. Hind tibiae short 

 but the tarsi long and strongly curved. 



Measurements : Length of body 2.75 mm. Length of antennal 

 segments, iii, 0.37 mm. ; iv, 0.12 mm. ; v, 0.166 mm. ; vi, 0.187 mm. 

 Total length 1.04 mm. Rostrum, iii, 0.187 mm.; iv, 0.187 mm.; 

 v, 0.1 mm. Total length, 1.34 mm. Length of hind tibiae, 

 1.4 mm. ; hind tarsus, 0.083 an d 0.35 mm. 



Alate viviparous female : General color of head and thorax dull 

 blackish brown, abdomen light cinnamon-brown. Sides of abdo- 

 men pruinose; dorsum of some specimens covered with a fluffy 

 coating of wax. Other specimens with a ridge of waxy threads 

 along the center of the back between the wings. In these speci- 

 mens the wings have probably rubbed the wax threads away. 

 Antennae and legs cinnamon-brown except the tarsi which are 

 black. Antennae rather slender, the third segment slightly longer 

 than the fourth and fifth together. Fourth and sixth segments 

 approximately equal in length. The third segment has from two 

 to four or more small round sensoria; the fourth one or two; 

 and rhe fifth two ; sixth segment long and finger-like. Rostrum 

 reaching barely beyond the hind pair of coxae. Wings with the 

 angle formed by m 1 and m 2 extending beyond the base of the 



