Neiv Species of Sfaphylinidne from, Singapore. 235 



the tlireo preceding together ; the posterior tarsi with the first four 

 joints gradually increasing in length, the 5th longer than the two 

 preceding together. Tibiae ciliate. Elytra distinctly sinuate 

 internal to the postero- external angle. 



This genus has the facics of Neosilvsa, and, apart from 

 the structure of the mouth-parts, the two species known 

 to me are at once distinguished from it by the absence 

 of ck)sc rugose puncturation of the thorax. 



91 . Ousilusa myrmicobia, n. sp. 



Pale rufo-castancous, shining. Head and elytra coarsely punc- 

 tured. Mouth-parts, legs, the first three and the last joints of the 

 antennae testaceous, the intermediate joints reddish. Length 2 mm. 



Head rather large transverse, the eyes moderately large and 

 prominent, the temples rounded and narrowed posteriorly; punc- 

 turation (for a small species) very coarse and close. Antennae 

 with the first three joints subequal, the 4th square, the nth to the 

 10th transverse, gradually increasing in breadth, the penultimate 

 two and a half times broader than long, the 11th elongate, pointed, 

 longer than the two preceding together. Thorax strongly trans- 

 verse, one and a half times broader than long, widest just before 

 the middle, the sides rounded and narrowed anteriorly, contracted 

 posteriorly in a nearly straight line to the obtuse posterior angles, 

 the sides and base bordered, the latter bisinuate, the disc with 

 ( ? (J) or without an oval impression in the middle occupying nearly 

 the whole extent, and in front of the posterior margin always with 

 a deeply impressed strongly punctured line; the sides exceedingly 

 finely and very sparingly punctured, the middle and anterior areas ' 

 (including the impression when present) with fine, shallow umbilicate 

 puncturation becoming evanescent posteriorly and laterally; 

 pubescence distinct, yellow, rather coarse and long. Elytra broader 

 and a little longer than the thorax, transverse, pretty closely and 

 very strongly punctured; pubescence yellow, rather coarse and 

 long. Abdomen very finely and very sparingly punctured, sparingly 

 and rather coarsely pubescent. 



Hah. In debris associated with a species of Pheidolc, 

 for the determination of which I am indebted to Mr. 

 Donistliorpe. Bukit Timah and 8embawang. 



02. Ousilusa castanea, n. sp. 

 Dark castaneous, shining; head and thorax finely and uniformly 



