Dec., '03] 



ENTOMOLOGICAL NKUs. 



323 



A New Species of Gall- Wasp (Cynipidael from 



Goldenrod (Solidago). 



BY A. ARSENE GIRAULT, Virg. Poly. Inst. 



Aulacidea solidaginis Girlt. sp. n. 



Description of (Jail Large, irregular, cuivecl, or knotted swellings of 

 the stems ; rough, surface generally hearing 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. 



Described from 3 specimens. 



These galls were collected during the winter, 

 the adults emerging from June 2-8, 1903. 



They are easily distinguished from the Lepi- 

 dopterous ( Gclcrhid gallif wHdaginis} and dip- 

 terous {Try pet a polita, 7'. solida^hns) galls 

 occurring on Goldeurod. The galls of Gele- 

 cliia are smaller, and hollow ; those of Trypeta 

 globular or long, pithy, and containing but 

 one or two larval cells. 





K* 



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 antennas, 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, 

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

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

 third of 3, black with some brown, succeeding joints 

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

 14 jointed, distal joint as long as preceding two combined (i3-jointed), 

 varying in length, equal to preceding joints ( i4-jointed). 



Described from 29 specimens. 



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

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



