No. 34-] HEMIPTERA OF CONNECTICUT I APHIDIDAE. 269 



Schizolachnus Mordwilko. 



S. pineti (Fabricius). Aphis pineti Fabricius. 



Spec. Ins., ii, 389, 1781. 



This species is easily distinguished by the white flocculent waxy 

 threads which cover the body. The wing venation is somewhat 

 deceptive as the median vein is frequently simple. The sensoria 

 are variable on the antennae of the alate forms as there are in most 

 specimens none on the third segment. In others there may be 

 from one to five. The location of these is quite distinctive as they 

 are located on the basal half of the segment instead of the distal 

 half which is the case with practically all other Lachnids. 



Apterous viviparous female: General color dusky dark grayish 

 green, covered with waxy threads which come from glands situated 

 mostly on the dorsum of each abdominal segment. Eyes deep red 

 almost black, basal portions of the antennae, the cornicles and the 

 legs, except a small portion of the front and middle tibia, dusky 

 black. The hind tibiae are jet black. The antennae are long and 

 slender, reaching midway between the hind coxae and the cornicles. 

 The third segment is shorter than the fourth and fifth segments 

 together, the fourth is slightly longer than the fifth and the sixth 

 is shorter than either of these; three and four without sensoria 

 and five with the usual large one at the distal end. Cornicles small 

 and irregularly cone-shaped. Cauda broadly angled. 



Measurements: Length of body, 2.15 mm. Length of antennal 

 segments, iii, 0.46 mm.; iv, 0.19 mm.; v, 0.20 mm.; vi, 0.17 mm. 

 Total length, 1.15 mm. Rostrum, iii, 0.12 mm.; iv, o.imm. ; v, 

 0.063 "1"^- Total length, 8 mm. Length of hind femur, 1.05 mm. ; 

 hind tibia, 1.62 mm. ; hind tarsus, 0.083 H~ 0.33 mm. 



Alate viviparous female : General color same as apterous forms. 

 Antennae perhaps a little more dusky. All parts of the legs are 

 black except the middle portion of the second pair of tibiae. 



Measurements: Length of body, 2.14mm. Length of antennal 

 segments, iii, 0.41 mm. ; iv, 0.23 mm. ; v, 0.23 mm. ; vi, 0.187 mm. 

 Total length, 1.25 mm. Rostrum same as in apterous form. 

 Length of hind femur, i.i mm. ; hind tibia, 1.78 mm. ; hind tarsus, 

 0.083 + 0-35 mm. 



Food plants : Pinus scopulorum, P. radiata. 



Unilachnus Wilson. 



U. parvus (Wilson). Lachnus parvus Wilson. 



Trans. Am. Ent. Soc, xli, 104, 191 5. 



Alate viviparous female: Body elongate and slender, antennae 

 and legs medium slender and thickly covered with long slender 

 hairs. Antennae reaching to the third pair of coxae and the 

 rostrum reaching to the second pair ; rostrum broad and blunt at 



