New Species of Staphylinidae from Singapoi'e. 87 



40. Philonthus sulcatus, n. sp. 



Black, shining; suture of elytra, first joint of the antennae and 

 the legs rufo-testaceous, the tibiae a little infuscate; penultimate 

 joints of the antennae as long as broad; front of the head deeply 

 sulcate ; dorsal series of thoracic punctures five * in number. Length 

 6"5-7 mm. Build of P. sanguinolentus, Grav., but with smaller head, 

 stouter antennae, and much less closely punctured abdomen. Head 

 suborbicular; eyes not prominent, viewed from above, their length 

 less than that of the temples; front in the middle line with a deep 

 longitudinal sulcus reaching to the anterior margin; the median 

 intra-ocular punctures much further apart from one another than 

 from tlic lateral ones; temples with four or five setiferous punctures; 

 ground-sculpture fine, transverse, strigose. Antennae with the 1st 

 joint and base of the 2nd reddish-testaceous, the 3rd scarcely longer 

 than the 2nd, the 4th to the 7th each a little longer than broad, 

 gradually decreasing in length, the 8th to the 10th about as long as 

 broad, Nth short, oval. Thorax scarcely longer than broad, a 

 little wider than the head, the sides parallel, scarcely converging in 

 front; disc with a series of five rather large punctures on either 

 side, of which the anterior and posterior ones are further apart 

 from the rest of the series; the sides with five punctures — three 

 mar the anterior angles, and two external to the dorsal row. 

 Scutellum very finely punctured and pubescent. Elytra as long as 

 the thorax, bronze-black, shining, the suture distinctly and sharply 

 reddish-testaceous; less finely and less closely punctured than in 

 /'. sanguinolentus, pubescence rather long and yellowish. Abdomen 

 iridescent, finely but not very closely punctured throughout; 

 pubescence rather long, coarse and griseous ; posterior margins of 

 the ventral segments reddish-testaceous. First joint of posterior 

 tarsi scarcely longer than the last, about equal to the two following 

 joints united. 



(5 1 . Anterior tarsi simple; sixth ventral segment feebly emargin ate 

 in the middle of the posterior border. 



Hah. Jveppel Harbour, in debris. 



41. Philonthus castaneipennis, n. sp, 



Black, shining, thorax and elytra chestnut-red, the latter scarcely 

 infuscate at the postero-external angles; abdomen pitchy; an- 

 tennae and mouth-parts reddish-testaceous, legs testaceous-yellow; 

 thorax with dorsal series of five punctures. Length 6 mm. 



f Including the anterior puncture in the series 



