ON HAWKWEEDS 



249 



Dlptera Capitulum swollen, containing one to four white larvae. 



Tephritis ruralis H. Low 864 

 Houard, No. 6196. 



Nematoda Flower-head swollen, remaining closed, stalk contorted, 

 sometimes cocted on its axis ; yellowish-green. 



Tylenchus hieracii Connold 865 

 Connold, Plant Galls, fig. 124. Trail, 1883. Houard, 

 No. 6198 (without name). 



Hieracium vulgatum Fries, go. Common Hawkweed. 



Hymen- Longitudinal or rounded swellings on the roots and 



optera stem, greenish-yellow and pubescent at first, becoming 



brown and glabrous. June to August. Larvae yellow. 



M. G. 



AulaCidea hieracii Bouch6 866 

 Syh. Aulax hieracii Sch. 



Connold, Veg. Galls, pi. 38 ; Plant Galls, fig. 125 (as on 

 H. sylvaticuni Gouan, but this is doubtful). Houard, 

 No. 6165. 



Acari 



Hymen- 

 optera 



Diptera 



Leaf margin rolled upwards and serrated. 



Eriophyes LONGiSETUS Nalepa 867 

 Trail, 1885. Houard, No. 6167. 



Hieracium boreale Fries. 96. Savoy Hawkweed. 

 Swellings on stem and roots. See No. 866. 



AULACIDEA HIERACII Bouchd 868 



Inchbald, 1865, p. 46. Connold, Plant Galls, p. 114. 

 Houard, No. 6145. 



Swollen and woody ovary. 



TRYPETA RETICULATA Sch. 869 



Trail, 1878, p. 66; Fitch, 1879, p. 257. Connold, Plant 

 Galls, p. 245. Houard, No. 6142 (without specific 

 name). 



Leaf folded. 



Macrolabis corrugans F. Low 870 

 Syn. Cecidomyia corrugans F. Low. 

 Connold, Plant Galls, p. 245. 



Hieracium umbellatum Linn. aggr. 88. Umbellate 

 Hawkweed. 

 Capitulum swollen, containing one to four larvae. 



Carpotricha papillata Fallen 871 

 Fitch, Entomologist, 1879, p. 257. Houard, No. 6151. 



