of Two itndescrihed Species of Thrips. 267 



length, but all rather shorter than the third, elongate, pyriform, 

 straw-coloured, tinged with brown externally; seventh long-ovate, 

 shorter than the preceding three, black; eighth short, slender, 

 black. Thoracic segmenls nearly as described in Idolotlnips Ilali- 

 day'i, see ante, p. 265. Abdomen rather robust, its sides parallel to 

 near the apex, when it diminishes, rapidly terminating in a short 

 cylindrical apical segment. Wings without rays, hyaline, with 

 long brown cilia. Legs black, with straw-coloured tarsi ; all 

 other parts black and shining. 



Hah. Mysore, i'ecds on the leaves of a species of Anacardium. 



These two species are so similar in many respects, that coming, 

 as they did, without any indication of their being distinct, and being 

 found feeding in company on the leaves of the same plant, I thought 

 it possible that they might be sexes of one species, the lesser the 

 male, and the larger, with its long tubular terminal abdominal 

 segment, the female : such a conclusion, however, being diame- 

 trically at variance with the published generic characters, I prefer 

 waiving my first impressions and regarding them as perfectly 

 distinct. The following extract from Major Hamilton's letter to 

 Mr. Douglas contains all the information we possess respecting 

 them — " I enclose with this some dried specimens of a small insect 

 we found in the jungle a short time back; they were feeding on 

 the leaves of a species of Anacardium, which I believe to be 

 A. senilcarpus. li. Hamilton, Major \st Regiment Native Infantry." 

 The letter is dated " l\Iijsore, 2 September, 1855." 



Postscript. — The foregoing notes having been submitted to 

 Mr. Haliday by the Publication Committee, and their publication 

 being recommended, I take the liberty of making the following 

 extract from that gentleman's most courteous note: — "The com- 

 munication is the more interesting as nothing was previously re- 

 corded of the habits of the genus Idololhrips, which appears to 

 be very widely diffused, as we now know of its occurrence in 

 Australia, collected by Mr. Darwin ; in South America, described 

 and figured by Meegcr in the Proceedings of the Vienna Academy, 

 vol. ix. 1852 ; in Columbia, several species from whence, collected 

 by M. Buquet, are in the cabinet of the British Museum; in 

 Ceylon, collected by Mr. Templeton ; and now, collected by 

 Major Hamilton, in continental India." 



