^T9 



the slight distinctions should be found of importance when a 

 good examination of a number of examples is made. Figure 1 

 shows the male structure fairly well of an example from Tan- 

 talus, Oahu (1500 ft.) with the sac extended. In other speci- 

 mens the shape of the membranous part of the sac is a little 

 different, and the shape of the apical portion of the median 

 lobe itself is not quite the same. 



Rhyncogonus sp. (?) 



In the Giffard collection there is one specimen that appears 

 to be a new species. It is a male, found in dead leaves at 

 Helemano, Oahu. It is scarcely <> mm. and has somewhat the 

 appearance of a minute blackhunii with flat shining elytra, 

 white hair extending all the length of the side of the thorax. 

 The male organ has been examined ; the apical portion of the 

 median lobe is unusually short and broad. This specimen has 

 l)een labelled by me as R. IS. 



Rhyncogonus koebeiei Perkins. 



This was described from a single male eaxmple, but was 

 subsequently reported by Dr Perkins as being plentiful in the 

 ]\ranoa Valley on Oahu. The species is the most remarkable 

 of the genus, the maxillae being completely exposed, and the 

 eyes not prominent. There is a small series from Palolo Val- 

 ley, Oahu, in the Giffard collection, including both sexes. In 

 the male the median lobe has the apical portion much pro- 

 longed and the tip curved upwards. The sac appears to be 

 almost cylindrical, and the large transfer apparatus to he so 

 -placed as, to continue the axis of the sac, but only one specimen 

 has been seen and confirmation is desirable. 



Rhyncogonus sp. n. (?) 



In the Giffard collection there are two males of a form 

 very closely allied to hoehelei, but with obsolete sculpture on 

 the thorax, the elytra a little differently shaped, being rather 

 shorter, more convex and with indistinct lateral margin. The 

 buccal cavity and the eyes are quite as remarkulde as rhey are 



