64 



THE BRITISH NATURALIST. 



[April 



in "Entomologist's Monthly Magazine," Vol. XXVIL, p. 170. 



NEMOCERA. 



Family — Mycetophid^. 



Since my former article on this family was published I have 

 discovered that sp. 16, G. ovnata, figured in " Stephen's Illustrations," 

 is identical with sp. 4, M. lutescens, Zett. Of Leptomovphus Walkeri 

 I took another example on September ist, 1891. Sp. 15, G. Winthemsii, 

 Lehm., was taken at Glanvilles Wootton by my father, in October, 

 1829, and by myself on May 29th, 1880. I can add the following 

 species to the list : — 



6a. Dynastoina fuscicovnis, Meig. Common in windoAVS and 

 amongst ivy, ferns, and other plants, thatch, &c. 



29a. Platyura laticovnis, Meig. A single specimen was taken by 

 my father at Glanvilles Wootton, in June, 1858. 



30a. P. discolomria, Meig. Taken by myself at Glanvilles 

 Wootton, in June, 1891. 



Family — Cecidomyid^. 

 Of this family my knowledge is very small, and I can therefore 

 give but a very imperfect list. The species are very numerous, 

 inhabiting many different plants, some depositing their eggs in the 

 sprigs, others in the leaves, others in the flowers, causing thereby 

 either the production of galls, similar to those produced by the 

 Cynijidcs, in the distortion of the flowers. One of the species produces 

 those well-known galls on the willows, which Swammerdam described 

 under the name of the Rose-willow. Others are extremely injurious 

 to the wheat crops, both in England, Europe, and North America. 

 One species, C. tritici, Kirby, deposits its eggs in the centre of the 

 corolla, where the larvae, when hatched, perhaps by eating the pollen, 

 prevent the impregnation of the plant. It is, however, subject to the 

 attacks of a pavaisite—PLatygasler tipiila^, Kirby. Another species, 

 still more destructive, is known under the name of the Hessian fly — 

 C. destructive, Say., and has spread terror amongst the farmers of the 

 eastern counties of England as well as in America. For particulars 

 consult the Agricultural Report of Miss Ormerod. The following are 

 the Dorsetshire species: — 



53. Catocha latipes, Hal. Generally distributed. 



54. Campyloinyza atra, Meig. Generally distributed. 



55. C. nceris, Meig. Scarce. Glanvilles W^ootton. 



56. C. bicolor, Wied. Scarce. Glanvilles Wootton. 



57. Lestremia leucopliara, Meig. Frequents fir trees in the winter 

 time. 



58. Lasioptera fuliginosa, Steph. Generally distributed. 



