HYMENOPTERA 9 



to the scape. In the % the cheeks beneath are prolonged into a large spine, 

 which differs in form in the different species, and is very variable in examples 

 of the same species. This sex is also remarkable in having the last joint of the 

 tarsi armed on either side towards the base with somewhat stout spines ; at the 

 apex there are longer and very fine ones. The pygidial area is flat, punctured, 

 and carinated at the sides, and bears appressed setae of a spinose character, which 

 give it an appearance of being strigose. The stipites of the </" genital armature 

 are rounded at the apex, and there bent inwards, and fringed with hairs ; a little 

 before the apex they each give off a long thin process, set with short hairs, and 

 the one crossing the other. The spine of the apical ventral segment is long, 

 strong, and slightly curved upwards. 



(i) Nesomimesa kauaiensis, sp. nov. 



Nigra, elongata, antennarum articulis apicalibus subtus, tarsisque d" anterioribus 

 plus minusve pallidis ; clypei cT margine antico plus minusve distincte tridentato ; 

 genis ? post oculos in spinam validam productis. Alae subinfuscatae. cf ? . Long. 

 8'5 — 13 mm. (Plate I. figs, i — i c.) 



Male black, the front tarsi testaceous, the apical joints of the antennae pale 

 beneath. Clypeus with dense silvery pilosity, its apical margin more or less distinctly 

 tridentate. Antennae long, subclavate, extending back as far as the apex of the 

 basal segment of the abdomen, the third joint considerably longer than the scape. 

 The front and vertex of the head are dull, without evident puncturation. Mesothorax 

 less dull than the head, with very feeble scattered punctures, the surface with an 

 exceedingly fine reticulation of raised lines ; wings more or less infuscate. Anterior 

 area of the propodeum smooth except for the minute surface sculpture (which is like 

 that of the mesothorax), not defined by a raised line, but rendered distinct by the 

 absence of the pubescence which covers the rest of the propodeum. Spines of the 

 front tarsi pale. Abdomen impunctate or nearly so, the petiole long and narrow, 

 much longer than the apical part of the segment, usually rounded above at least 

 on its basal portion, but somewhat compressed in some examples. 



Female generally larger and more robust than the t/, but with similar sculpture. 

 The apical joints of the antennae more or less fulvous beneath. Head large and 

 wide, mandibles very long, the anterior margin of the clypeus angulately produced 

 in the middle, the cheeks behind the eyes produced into a strong spine, which 

 continues their outline, the antennae more strongly clavate than those of the </, their 

 third joint very long and slender. Anterior tarsi with much longer pale spines, and 

 the posterior and intermediate tibiae and tarsi with the spines much more strongly 

 p. F. H. 2 



