198 ASHMEAD 



The head is large, transverse, nearly twice the width of the thorax, 

 with the temples rounded, not quite the width of the eyes. The thorax 

 is constricted near the middle, the scutellum being only feebly differ- 

 entiated by a small elevation which is not distinctly separated from the 

 mesonotum. Metathorax rounded off posteriorly and without a trace 

 of the transverse apical carina. 



Type. Cat. No. 5607, U. S. Nat. Museum. From Kukak Bay, 

 July 4. One specimen. 



THEROSCOPUS POPOFENSIS sp. nov. 



Male. Length 4.4 mm. Black, subopaque, coriacous, the abdomen 

 shining with a piceous or rufous tinge at apex of the second segment ; 

 palpi fuscous ; first joint of the flagellum with a yellowish annulus at 

 extreme base ; legs honey-yellow, with the coxae, first joint of tro- 

 chanters and the hind femora black ; tips of hind tibiae, their tarsi, more 

 or less, except at apices of joints and beneath, and the middle and front 

 femora above basally, fuscous. Wings hyaline, the stigma dark brown 

 but yellowish at base and between the parastigma and stigma, the inter- 

 nal veins brownish, the tegulae and the longitudinal veins at the base of 

 the wings pale yellowish. The antennae are 22- or 23-jointed, not 

 quite the length of the body, the first joint of the flagellum the longest 

 although only a little longer than the second, the joints beyond imper- 

 ceptibly shortening. The metathorax has the pleural and transverse 

 apical carinae distinct and there is also a more or less completely defined 

 hexagonal area. 



Type. Cat. No. 5608, U. S. Nat. Museum. From Popof Island. 

 One specimen. 



Genus Pezomachus Gravenhorst. 

 PEZOMACHUS NIGRELLUS sp. nov. 



Male and Female. Length 1 .5 to 2 mm. Entirely black and shin- 

 ing although the surface is feebly alutaceously sculptured ; legs black 

 or dark fuscous, with usually the sutures of the trochanters, knees and 

 the front and middle tibiae and tarsi and sometimes the hind tibiae 

 basally, rufo-testaceous, rarely with all the tibiae and tarsi rufo-tes- 

 taceous. 



The antenna? are as long as or a little longer than the body, in the 

 female i8-jointed, in the male 2o-jointed, the first joint of the flagel- 

 lum being slightly the longest and always with a yellowish annulus at 

 the extreme base. Both sexes are apterous. The metathorax is some- 



