310 [Decembkr 



teriorly, slightly hunched anteriorly, and acute at both ends. Found in 

 spherical galls generally located between the veins that branch from the 

 midrib of the leaflet of the shag-bark hickory. I am acquainted with the 

 similar galls of PemjMyus rari/pecau/is Fitch, which grow on the leaf- 

 stalks and twigs of the same tree, but like Dr. Fitch I have never yet met 

 with the winged insect. From the similarity of its galls to that of the 

 above and its occurring on the same tree, that insect may not improbably 

 belong to Plii/lloxera. The gall of /-*. rarijee-fjJobnIi often occurs in com- 

 pany with that of P. rarysefollse, but it is very distinct. On June 8th I 

 noticed a few imagos of a large T/in'j)t< in some galls of/*, car^ec/olise which 

 were at that time full of their normal tenants; on June 22nd I noticed in 

 galls of the same insect on the same trees many red pupaj, apparently of 

 the same Thrips, which seem to have supplanted or exterminated the 

 Phylloxerse; for almost every gall contained 6 or 7 Thripide pupte and but 

 very few PhyJloxtrse- 



HYMENOPTERA. Formicid.^. 



The yellow ant mentioned above under the genus Pamphujus is not de- 

 scribed either by Say or by Fitch. It may probably be a Fabrician species; 

 but as I possess the three sexes taken from the same nest it may be worth 

 while to describe it. It belongs to Say's § B of Foj-mirn •• 1st cubital cel- 

 lule with a recurrent nervure," and somewhat resembles F. t/i's/ocafa Say, 

 of which species also I have the sexes from the same nest, but is much 

 smaller, and rhe 9 ? ^f that species are not yellow but piceous. 



Formica aphidicola n. sp. — '^ . Piceous. Epistoma longitudinally carinate, the 

 carina wide and quadrangular; tips of anteunte a little pale; eyes black and 

 almost round. Abdominal scale slightly emarginate above, with no indentation 

 opposite to it. Legs with the tips of tibiae, and the tarsi ferruginous. Wings sub- 

 hyaline, much clouded with brown on their basal half; nervures and stigma brown ; 

 the recurrent nervure forming the discoidal cell generally abbreviated, so as to 

 leave the cell incom2:)lete; anal nervure abruptly angulated in its middle, and in- 

 terrupted before the angulation. The J differs in being larger and jjaler, and in the 

 legs and antennse being ferruginous. The carina of the epistoma is absent. The 

 9 differs from % in being entirely yellow, e.xcept the eyes which are very small 

 and black. When dried it assumes a slight rufous tint. The carina of the epistoma is 

 absent. Length % Ab — .16 inch: 9 -25 inch: 9 -15 inch. Alar expanse % .-14 inch: 

 9 .60 inch. 



Described from 2^,29,59. 



