38 Indian Museum Notes, [Vol. VI. 



11, Heterobostrichtts unicornis, Wat. 



Bostrichus unicornis^ Waterhouse, 1879, An. Mag. Nat. Hist. 

 5th Ser., Ill, p. 361. 



Fairmaire, 1893, Ann. Belg. 1893, p. 539. 



Lesne Ann. Soc. Ent. Fr. 1898, p. 558. 



Prothorax as wide as long. Elytra glabrous, with well-marked 

 punctuation. ? . Transverse diameter of the frontal arc does not 

 cover one-quarter of the inter-ocular space. 



Long. g\ — 11^ millim. — Long, parallel, dark brown with thighs 

 slightly reddish and the antennal club rufous. Elytra glabrous. 

 Heteromorphous cJ unknown. 



? . Head furnished above with a tubercle densely hairy, situated 

 in the passage of the frontal clypeal suture and encroaching both on 

 the forehead and on the epistome. The diameter of this tubercle does 

 not cover a quarter of the space between the eyes. Punctuation on 

 forehead very fine and dense. Prothorax slightly rounded at sides, 

 greatest width in middle ; anterior margin slightly indented, the 

 indentation bounded on either side by an erect but not prominent 

 tooth; posterior angles rounded. The middle of the posterior space 

 of the pronotum covered with fine and dense flattened granulations. 

 Elytral punctuation well marked, homogeneous, not in regular lines. 

 Apical declivity depressed on either side of the suture, the latter not 

 prominent. Sutural angle shining and not punctuate. Apex of elytra 

 slightly turned up. Intercoxal lobe of the mesosternum with a fine 

 median keel. Abdominal punctuation fine and dense, the pubescence 

 being excessively fine. Joints 2 and 5 of the posterior tarsi sub-equal, 



Homeomorphous <J . The type of the species is a homeomorphous 

 <J. Head as in ? but elytra furnished on either side on the upper 

 edge of the apical declivity with two tubercles, the outer one simple, 

 the inner larger and prolonged into a robust horn curved inwards. 



Distribution, — India: Canara in Bombay Presidency. (Taken by 

 C. R. D. Bell), Madras, Rangoon. 



Coll. Ind. Mus. Calc. — Andaman Islands, Calcutta. 



Life-History. -"-Nothing appears to be known about this. 



13, Heterobostrichus pileatus, Lesne. 



Lesne, Ann. Soc. Ent. Fr., 1898, p. 559. 



Prothorax longer than wide. Elytral punctuation less well marked, 



? . Tranverse diameter of the frontal arc covers more than a third 

 of the inter-ocular space. 



Length, 9 — 11 millim. Very similar to unicornis. Prothorax is 

 widest slightly behind the middle. In the $ the arc or hoop is much 



