264 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. 



Total length, 1.2 mm. Rostrum, iii, 0.21mm.; iv, 0.175 mm.; v, 

 0.063 mm. Total length, 1.9 mm. Length of hind tibiae, 

 2.42 mm. ; hind tarsus, 0.31 mm. 



Food plant: Piniis spp. 

 D. atlanticus (Wilson). Lachniella atlantica Wilson. 



Can. Ent, li, 21, 1919. 



Apterous viviparous female: Antennae light at base of third 

 segment, remaining parts dusky black. All three pairs of legs 

 black except the base of the femora and a yellow area toward the 

 base of each tibia. Third antennal segment approximately equal 

 in length to the fourth and fifth together. Fourth segment 

 slightly shorter than the fifth and the sixth shorter than the fourth. 

 Third segment with a single sensorium, fourth with one and fifth 

 with two. Beak extending to the tip of the abdomen. Cornicles 

 extremely large, volcano-shaped. 



Measurements : Length of body, 2.37 mm. Length of antennal 

 segments, iii, 0.44 mm. ; iv, 0.21 mm. ; v, 0.23 mm. ; vi, 0.166 mm. 

 Total length, 1.25 mm. Rostrum, iii, 0.21mm.; iv, 0.187 mm.; 

 v, 0.063 "^^- Total length, 2.04 mm. Length of hind tibia, 

 2.20 mm. Hind tarsus, 0.31 mm. 



Alate viviparous female : Color of antennae and legs as in the 

 apterous form. Third antennal segment approximately equal in 

 length to fourth. Third segment with six to eight large circular 

 sensoria, fourth with two and fifth with two. Cornicles extremely 

 large. Beak extending to the base of the cornicles. Hairs on 

 legs, body and antennae fairly abundant and longer than those of 

 other species in this group. Those on the femora and at the base 

 of the tibiae are not quite as upstanding as with other species in 

 this group. 



Measurements : Length of body, 2.39 mm. Length of antennal 

 segments, iii, 0.46 mm. ; iv, 0.21 mm. ; v, 0.23 mm. ; vi, 0.145 mm. 

 Total length, 1.28 mm. Rostrum, iii, 0.21mm.; iv, 0.187 mm.; 

 V, 0.063 "^"^- Total length, 2 mm. Length of hind tibiae, 

 2.08 mm. Hind tarsus, 0.33 mm. 



Food plants : Pinus spp. 

 D. pergandei (Wilson). Lachniella pergandei Wilson. 



Can. Ent., li, 46, 1919. 



Apterous viviparous female : The prominent character of this 

 species is the deep brown to almost jet black tibiae set with heavy 

 reclmate spines. 



Antennae medium slender and extending to the second pair of 

 coxae. All segments light-colored at the base, dusky toward the 

 tip. Sixth segment finger-like and approximately as long as the 

 fourth. Fifth segment with three small sensoria toward the dista) 

 end. Beak short, reaching to the base of the third pair of coxae. 

 Tip dusky black. 



Cornicles conical and with a widely sloping base. Cauda 



