Dec, '03] 



ENTOMOLOGICAL NEWS. 



323 



A New Species of Gall- Wasp (Cynipidae) from 

 Goldenrod (Solidago). 



By a. Arsene Girault, Virg. Poly. Inst. 



Aulacidea solidaginis Girlt. sp. n. 



Description of Gall — Large, irregular, curved, or knotted swellings of 

 the stems ; rough, surface generally bearing aborted growths ; interior 

 pithy, slate blue ; tasteless ; multicellular, the larval-cells large, and 

 smooth interiorly. Length, varies ; 5.5-10, 5 cm^ 

 Thickness, 1.6-2, i cm., through greatest diameter. 

 Locality, Blacksburg, Virginia. 



\^ H Described from 3 specimens. 



These galls were collected during the winter, 

 the adults emerging from June 2-8, 1903. 



The}^ are easily distinguished from the Lepi- 

 dopterous ( Gelechia gallce solidagi^iis) and dip- 

 terous ( Trypeta polita, T. solidaginis) galls 

 occurring on Goldenrod. The galls of Gele- 

 chia are smaller, and hollow ; those of Trypeta 

 globular or long, pithy, and containing but 

 one or two larval cells. 



Description of Adults. — Female : length of body 2.8, 

 3 40 mm. Head and thorax black, rugose ; face with 

 a single median carina ; mandibles tipped with black ; 

 abdomen glabrous, dark brownish, darker caudad, 

 microscopically punctate ; hypopygium blunt, the 

 ventral spine long and prominent ; legs rugose, or 

 roughly striate, unicolored with antennae, which are 

 lighter than abdomen ; venation prominent, dark ; 

 antennal joints cylindrical oval, i curved, sub-cuneate, 

 equal to 3, 4, 5, 6 and 7, .2 smallest, cuneate, 8, 9, 10, 

 II and 12 sub-equal, smaller than preceding joints, 

 excepting second, sub-parallel; i, 2 and basal one- 

 third of 3, black with some brown, succeeding joints 

 brownish, coarsely striate ; i and 2 punctately sculptured ; antennae, 13- 

 14 jointed, distal joint as long as preceding two combined (13-jointed), 

 varying in length, equal to preceding joints (14-jointed). 



Described from 29 specimens. 



Male. — Length of body, 2, 2 95 mm. About same as female. Color 

 basal joints of antennae more variable, in the smallest specimen pitch 



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