626 Records of the Indian Miiseum. [Vol. VIII, 



Type: Indian Museum, No, 3273/19, iX 07 mm., Rotung^ 

 Abor Expedition, 26-xii-i9ii, 1400 feet {de Courcy), unique. 



This species, the very smallest known, was included by me in 

 the table of the genus I published in 1919. It is of a reddish 

 ferrugineous colour and can be distinguished from all the forms 

 described, not only by the ver}' small size, but also by the meso- 

 sternal process being longitudinally and highly tectiform through- 

 out its whole length. The elytra are narrowly laminate and 

 dilated on their sides, also the sides of the pronotum, the lamina- 

 tion being here, however, still more narrow. The 10 elytral series of 

 tolerably coarse punctures are not impressed, the inner one being 

 only a trifle deeper towards the apex, near the very shortened 

 sutural stria or rather sutural impression. The punctuation of the 

 interstices is nearh^ as coarse as the principal one, forming a single 

 row on each interstice (secundar series). 



Form oblong-oval, narrowed behind and moderately convex. 

 The head and pronotum are devoid of the transversely impressed 

 scratches found in other species and the interstices between the 

 ver}- microscopic punctures are shining (69 diameters). 



Hclocharei; (Hydrobaticus) lentus, Sharp. 



One specimen of this common species was met with by 

 Dr. Kemp in small tanks at Dibrugarh, N.-E. Assam, I7-I9'xi' 

 1911 (No. 4141/19). 



A second individual of smaller size and with the punctuation 

 of the pronotum coarser and more densely distributed seems to 

 belong to a variety of it. A similar specimen in my collection 

 (Cochinchine) has been seen by Regimbart and named by him H. 

 lentus var ? 



Hclocharcs (s. str.) kempi, sp. nov. 



Parvissimus, subdepressus, obscure niger, limbo elytrorum 

 anguste prothoracisque aliquantum latius rufo, capite utrinque 

 ante oculos translucide ac rufescenter maculato ; palpis medio- 

 cribus cumque genibus, tibiis et tarsis rufis ; palporum maxil- 

 laris ultimo articulo penuUimo aliquantum longioribus ; supra 

 subtiliter punctatus. Elytra sine striae. Mentum evidenter 

 excavatum. Subtus niger ; segmenti ultimi marginis posterioris 

 perparvule excisis. 



Type : Indian Museum, No. 414S/19, 2 mm., Yembung, Abor 

 Expedition, iioo feet, I9'ii9i2 [Kemp). 



Three specimens of this very interesting species were secured 

 at Yembung, on the banks of a stream, under stones. It is the 

 smallest insect of the genus, having the appearance of a Limnehius , 

 readily distinguished by the deep black colour, miich polished 

 surface, lack of striae and of mesosternal carina and also by the 

 very minute and ciliated notch on the extremity of the 5th ventral 

 segment. The last joint of the maxillary palpi is, however, a little 

 longer than the preceding one, this character being generally the 



