MACROLINUS. 265 



This species lias a very clo.se relationshii) with J/, andaman- 

 ensis, from which it dift'ers onl}- in a few small details. The 

 club of the antemia is composed of rather shorter lamella?, the 

 marginal processes of the head are not vertically bifurcated, 

 the frontal ridges end in shaq) tubercles and are strongly 

 bisinuate, making the apical angle very acute, so that the 

 frontal area a])|)ears shorter and less regularly triangular in 

 shape. The mesosternum has on each side of its base a small 

 roundish area covered with fine close scratches, and tlie median 

 area of the metasterum is without punctures in the hind angles. 



Length, 34 to 35 mm. ; breadth, 13 mm. 



NicoBAR Is. : {F. A.RoepstorJf). 



Type in the Indian Museum, Calcutta ; co-type in the British 

 Museum. 



The name Acerahis nikoharicus was given by Redtenbacher 

 (Reise der Xovara, Zool. ii, 1867, \). 49) to a specimen presum- 

 ably to be found in the Vienna ^luseum. The description, 

 according to Dr. Gravely (Mem. Ind. Mus. iii, 1914, p. 291), is 

 made from the anterior half of a s]3ccimen of the present 

 species, to which the posterior half of an Aceraius has been 

 fixed. The name can therefore be ignored. A good many 

 other puzzling " species " of insects are no doubt to be 

 accounted for liy mistakes of the same kind. 



165. Macrolinus andamanensis. (Plate XXIII, fig. 14.) 



Bitsilianus andamanensis 8tol., Jouni. Asiat. Soc. Bengal, xlii, 2, 



1873, p. 160. 

 Macrolinus andamanensis Gravely, Mem. Ind. Mus. iii, 1914, 



p. 242, pi. 13, fig. 41. 



Elongate and moderately convex, the pronotum very smooth, 

 without median groove. The club of the antenna consists of 

 three long terminal lamellae and three shorter preceding ones. 

 The middle tibia is fringed with short, not very dense reddish 

 hairs. The head is finely ])unctured, the median tubercle 

 rather sharj3, the supraocular ridges short and broad, the frontal 

 area not very short, the frontal ridges meeting in a slightly 

 obtuse angle and not strongly bisinuate, the marginal processes 

 triangular, rather sharj^, bifurcated as seen in profile. The 

 lateral margins of the pronotum, and the lateral scars are 

 finely and very closely punctured, and the lateral grooves of 

 the elytra are very minutely punctured. The median area of 

 the metasternum bears only a few very fine punctures in the 

 hind angles. 



Length, 35 mm. ; breadth, 14 mm. 



Andaman Is. : Ponighat, Hopetown (i?. B. S. Sewell, July) ; 

 Homfray's Sts. {G. Rogers). 



Type in the Indian Museum, Calcutta. 



Dr. Gravely has described the larva of this species taken 



