Remarks on Miscellaneous Subjects. 425 



wither. The larvae are inactive, hardly perceptible, and in 

 searching for them the nymph, or insect in its second stage 

 of development is seen running over the leaf ; it is of a grey 

 colour, and covered with hair or down. Fig. 1 , a. PL xi upper 

 part of the body shewing the elementary elytra. Fig. b. 

 lower portion, with the oral orifice between the insertion of 

 the first and second pair of feet ; e. one of the antennae which 

 has six articulations, the last of which is, longer than any of 

 the others except the first, terminates in a hairy point ; e t 

 anterior leg of the right side ; f, middle, and g, posterior 

 leg of the left side. The tarsi have but a single articula- 

 tion terminated by a minute hook, and the body, elytra, and 

 limbs are fringed, the latter irregularly, with tufts of bristles. 

 These insects do not destroy indigo by perforating the 

 leaves, but by causing their contraction into folds, apparently 

 for the retention of moisture after rain or heavy dew, which 

 seems to be essential to the larvae. I have collected several 

 specimens of this insect, which I shall place in the hands of 

 some eminent entomologist, so that any further description 

 or attempts to identify it from me would be unnecessary. It 

 is we may remark, quite different from the turnip fly des- 

 cribed, p. 299, by Dr. Pearson, which also appears to be 

 another insect destructive to indigo. 



II. Remarks on Delphinus Gangeticus, Roxb. — There 

 was a good opportunity afforded for collecting informa- 

 tion regarding the several peculiarities of the Gangetic 

 dolphin on the recent destruction of the sunken hull of 

 a ship by gunpowder, effected by Capt. Fitzgerald of the 

 Bengal Engineers. A column of water was thrown up to 

 a considerable elevation by the explosion, and with it, a 

 considerable number of fishes and other animals ; amongst 

 the rest, two fine specimens of the Gangetic dolphin, which 

 have since been preserved by Colonel Powney. About forty 

 years ago, Dr. Roxburgh described for the first time a male 

 specimen, since then no further information has been collect- 



