315 



prominent. It differs much also in facies from Synchita (at least 

 from S. juylandis) being much narrower and more elongate, 

 with longer and more slender antennae, the club of which is 

 notably smaller and especially less globular.* 



D. hilaris, Blackb., though very different from lineatocollisy 

 Blackb. (vide supra) as a species, does not seem to differ from it 

 in respect of any character likely to be generic. 



D. joarva, Blackb. This species cannot stand in Ditoma, nor 

 can it be placed in any other hitherto described genus known to 

 me. It differs from Ditoma by the eleventh joint of its antennae, 

 much narrower (and a little shorter) than the tenth, by the 

 presence of well defined antennal sulci which are so long as to 

 curve outward behind the eyes, by the head furnished with lobe- 

 like processes behind the eyes which project laterally bejond the 

 outline of the eyes, and by its pronotum having a comparatively 

 wide and distinctly serrate flattened lateral border. 



SPARACTUS. 



I believe this genus to be identical with Illestus. Its type is 

 Ditoma interrupta, Er., the correctness of my identification with 

 svhich of a small Colydiid (common in Tasmania and Southern 

 Australia) is not, I think, open to the slightest uncertainty. In 

 the subsequent diagnosis of the genus Spar actus (formed for this 

 insect), the tibiae are not mentioned, but in Erichson's tabulation 

 of Colydiid genera the place given is among those having unarmed 

 tibiae. This is a mistake as its tibiae have a very short apical 

 spine,— which however might very easily be overlooked as from 

 most points of view it is hidden. In all other respects the 

 Colydiid mentioned above agrees perfectly with the generic diag- 

 nosis and with the description of the species. It also agrees with 

 the diagnosis of Illestus, with Pascoe's figure of Illestus (Journ. 

 Ent. II., pi. iii., fig. 4), and with Reitter's description of Illestus 

 Grouvelhi (M. T. Miinch. Ent. Ver. 1877, p. 133). The only 

 apparent discrepancy in the descriptions of D. interrupta and 

 /. Grouvellei is in the statement that the inner elytral costa of 

 D. interrupta is interrupted whereas in his description of 

 Groiicellei Reitter implies that the second costa only is inter- 

 rupted. In a subsequent note, however, Grouvelle speaks of only 

 the second costa being "distinctly several times" (deutlich 

 mehrmals) interrupted. In the specimens before me neither 

 costa is quite entire (as the external one is) but the middle one 

 is much more distinctly interrupted than the inner one. 



Since writing the note on D. perjorata I have ascertained that the 

 Malayan genus Bupala, Pasc. , presents the characters I have specified as 

 exhibited by that insect, to which genus, therefore, I think I may safely 

 attribute it. 



