226 Proceedings of the Biological Society of Washington. 



soon after the white spot and is resumed in the form of a subapical spot, 

 common to the two elytra. The surface bears a few upright black spine- 

 like hairs and toward the apex is rather densely covered with pale silky 

 pubescence. Under parts black, shining, sparsely and finely punctured. 

 The side pieces of the metasternum are densely clothed with white silvery 

 pubescence, as also are the lateral portions of the abdominal segments. 

 Legs black, except for the apical halves of the tibiae and the whole of the 

 tarsi, which are rufopiceous. Length: 5.5 mm. 



Type: A female from Davao, Mindanao, P. I., C. F. Baker (Baker No. 

 4268). 



2. Tillus nitidicollis, n. sp. 



Similar in form and general appearance to T. mindanensis, but larger. 

 Head slightly coarser and more densely punctured, epistoma with fine trans- 

 verse wrinkles. Antennal segments broadly triangular, the outer angles 

 rounded. Thorax more densely and coarsely punctured and with a very 

 distinct subapical transverse impression. The elytra are colored quite 

 similarly to those of the preceding species but the brown is of less extent 

 anteriorly and much greater posteriorly. The ivory spot in this species 

 turns sharply at its sutural end, and, filling the fifth interval completely, 

 runs forward to the basal third. The basal portion of each elytron is gib- 

 bous and in place of the longitudinal pit, there is a dull, raised portion of 

 somewhat greater extent. The stiff spine-like hairs are confined to the 

 basal part and the entire surface is covered with very short fine hairs, whose 

 color is the same as that of the portion of the elytron from whence they 

 arise. The under parts are more roughly sculptured, especially the meta- 

 thorax. The legs are similar in coloration to those of T. mindanensis. 

 Length: 8 mm. 



Type: A male from Sandakan, North Borneo, C. F. Baker (Baker No. 

 11,496). 



Melanoclerus, n. gen. 



Form robust, eyes moderately coarsely granulated and quite prominent. 

 Antennae eleven segmented, very short, hardly longer than the distance 

 between the eyes, segments nine to eleven forming a compact club, the last 

 segment the longest. Last segment of the maxillary palpi cylindrical, some- 

 what acuminate, that of the labial palpi large, subtriangular, the outer side 

 broadly rounded. Thorax barrelshaped, somewhat constricted behind. 

 Elytra covering the abdomen, sutures closed, punctured in rows, the punc- 

 tures disappearing before basal half. Abdomen with six visible ventral 

 segments. Tarsi with five segments, all visible from above, the first four 

 short, second, third and fourth with lamellae beneath. Claws bifurcate, 

 the inner portion nearly as long as the outer. 



Genotype: Melanoclerus parvus, n. sp. 



This genus should be placed near Gastrocentrum Gorham 1876, judging 

 from the structure of the under parts and of the claws. 



