178 ASHMEAD [172] 



STIBOSCOPUS SOLITARIUS sp. nov. 



Male. — Length 3.5 mm. Black, the head above and the meso- 

 thorax, except the metanotum, polished, shining ; abdomen with a nar- 

 row testaceous band at base of third ; palpi and tegulse yellowish- 

 white ; legs mostly black, with the sutures of the trochanters, knees, 

 tibiae, except at apex, and the front and middle tarsi, flavo-testaceous. 

 Metathorax areolated, the areola hexagonal, longer than wide. Wings 

 hyaline, the stigma and veins brown. Abdomen a little longer than 

 the head and the thorax united, the first three segments finely coria- 

 ceous, opaque, the following smoother, the second segment a little 

 longer than wide, the third a little wider than long. 



Type. — Cat. No. 5578, U. S. Nat. Museum. From Popof Island, 

 July 12. One specimen. 



STIBOSCOPUS MANDIBULARIS sp. nov. 



Male. — Length 4 mm. Polished black ; abdominal sutures i and 2 

 testaceous ; legs, except the hind tibiae basally and the middle femora 

 basally ferruginous. Antennae 23-jointed, the first three joints of the 

 flagellum subequal, the first scarcely longer than the second. Wings 

 hyaline, the stigma and veins brown. Metathorax areolated, the 

 areola hexagonal. Abdomen a little longer than the head and thorax 

 united, polished, shining, except the petiole which is feebly wrinkled, 

 subopaque, with two feeble, median dorsal carinae toward base. 



Tyfe.—C^\.. No. 5579, U. S. Nat. Museum. From St. Paul Is- 

 land, August (Fur Seal Commission). One specimen. 



STIBOSCOPUS SITKENSIS sp. nov. 



Male. — Length 3.5 mm. Polished black; mandibles rufo-piceous ; 

 sutures 2 and 3 of abdomen and the legs, except hind coxae, their 

 femora, their tibiae toward apex and their tarsi, ferruginous. Antennae 

 2i-jointed, the three or four basal joints of the flagellum elongate, the 

 first the longest with a yellowish annulus at base. Metathorax areo- 

 lated, the carinse strongly elevated, the areola hexagonal, longer than 

 wide. Wings hyaline, the stigma and veins light brown, the areolet 

 irregularly pentagonal, receiving the second recurrent nervure much 

 beyond its middle. Abdomen elongate, longer than the head and 

 thorax united, the petiole and second segment shagreened, the follow- 

 ing smooth and polished. 



