No. 34-] HEMIPTERA OF CONNECTICUT: APHIDIDAE. 259 



This species is easily recognized by the wing venation and the 

 sensoria on the antennal segments. The principal color marking 

 is a large quadrangular black spot on the dorsum of the abdomen 

 of the alate form. The antennae reach to the base of the thorax. 

 The third segment bears from twelve to fifteen large transverse sen- 

 soria which are prominent and raised, fourth segment with three to 

 five and fifth with one to four sensoria ; sixth with one or two small 

 sensoria near the base and a large one at the base of the finger- 

 like unguis. Wings with the median vein having but one fork. 

 Stigma short, stout, curved on the sides, and pointed at the ends. 

 The winter is passed in the egg stage on Cornus spp. The summer 

 stages occur on the roots of various grasses and weeds. 

 On Cornus paniculata. 

 New Haven, 22 Oct., 1915 (B. H. W.). 

 A. querci (Fitch). Schizoneura querci Fitch. 

 Nox. and Ben. Ins. N. Y., 5, 804, 1859. 



This species so closely resembles Anoecia corni that it has for 

 years been considered by American writers as the same. There 

 are, however, a number of distinct differences. The two species 

 are found on Cornus in the spring and fall and live on grass roots 

 during the summer months. 



Querci differs from corni by having oval or circular sensoria 

 and generally shorter antennae. 



Spring migrant (from Cornus) : General color of head and 

 thorax black ; eyes deep reddish brown. Antennae dusky to black. 

 Abdomen greenish with a pink or brownish tinge. A row of black 

 patches along either side of the abdomen. The wing veins are 

 solid and the median vein has a single fork. The stigma is short 

 with the lower edge rounding to the apex like the blade of a blunt 

 knife. 



Alate viviparous female: (Summer form) General color yellow- 

 ish green, antennae, thorax and legs dusky to black. Abdomen 

 yellowish, with fine dorsal stripes and a row of six black spots 

 along each side. Antennae with six segments reaching to the 

 hind coxae ; the sixth with a short thumb-like spur. Third 

 segment with three or four widely separated round sensoria. 

 Fourth and fifth with one sensorium each, near the distal end. 

 Cornicles small and cone-shaped. Cauda broadly rounded and 

 short. Antennae, legs and body with numerous short hairs, some 

 of which are curved as in the apterous form. 



Measurements: Length of body, 1.66 mm. Length of antennal 

 segments, iii, 0.18 mm. ; iv, 0.065 mm.; v, 0.09 mm.; vi, 0.078 

 and 0.03 mm. Rostrum as in the apterous form. Length of hind 

 tibia, 0.82 mm. 



Fall migrant: General color nearly the same as for the spring 

 migrants except that in some specimens sent me by Professor 

 Gillette a broad quadrangular band is present on the abdomen. 

 This spot is not as black as the one on Anoecia corni. 



