360 MR. HARDY ON THE TURNIP-FLY. 



spreading of the lees of oil, or soot from the chimney, as a 

 remedy from the fly."— Vide Bell's Rollins Arts and Sciences, 

 p. 42. 



It is deserving of notice, that among the insects described 

 hy Mr. Waterhouse, from the collections brought to this 

 country by Mr. Darwin, is a Haltica, which is nearly iden- 

 tical with our Turnip-Fly, and is stated to be equally de- 

 structive in New Holland. — Proceedings cftbeEnt Soc. of Lon- 

 don^ ^d January, 1837. 



The Mining Grub, described at p. 339 of the present volume 

 of the Club's Proceedings, having now completed its transfor- 

 mations, I am enabled to relate the subsequent stages of its 

 history. The pupa is narrowish, elongate-oval, finely striated 

 transversely, convex above, less so beneath, brown, darker at 

 the tips and across the lines of the segments ; the segments 

 are pretty distinct, finely and closely wrinkled at the edges ; 

 some minute foveolae run down the edges both below and 

 above ; the anterior end is compressed on the uj^per surface, 

 and as it were scooped out, the hollow being margined on 

 each side by a lateral keel, which, after occasioning the sides 

 to protrude a little at this part, turns in and nearly con- 

 verges behind ; the keeled margin is slightly foveated beneath, 

 and the compressed area has a space longitudinally elevated 

 in the middle ; the apex is sub-truncate, and consists of a 

 roughish ridge, tipped at each end with a small tubercle pro- 

 duced into a fine divergent spine, which is bifid at the tip, 

 and has at its base two minute spines placed in opposite direc- 

 tions ; the posterior apex is somewhat narrowed, its two ends 

 project in the form of small bluntish tubercles ; exactly be- 

 tween these, but a little above their level, there is a stoutish 

 prominence, which is surmounted by two ovate, sharp- 

 pointed, spine-tipped, palish-coloured, divergent tubercles, 

 which, as well as the process that bears them, point somewhat 

 upwards ; beneath the apex the slope is almost that of the 

 under surface, and the anus is indicated by a slight tubercle, 

 divided lengthways, situated behind a wrinkle. Length H- 

 1^ lines. The pupa is sometimes found in the chamber the 

 Grub has excavated, but more frequently beneath the soil. 

 The Fly appeared on the 3d of September, having been in the 



