250 ASHMEAD [244] 



ceous, the front coxae and trochanters beneath yellowish, the middle 

 coxae basally and the hind coxse blackish. Antennae 25-jointed, longer 

 than the body, the joints of the flagellum about thrice as long as thick. 

 Thorax with distinct parapsidal furrows, the metathorax feebly aluta- 

 ceous but shining, the pleural carinae indistinctly defined, the median 

 carina wanting, the spiracles small and round. Wings hyaline, the 

 costal vein, basal nervure and parastigma piceous black, the stigma 

 and internal veins brown. The abdomen, except the first segments, 

 is smooth, shining and impunctate ; the first segment is a little longer 

 than wide, shorter than the second, finely rugulose, especially towards 

 base, and has distinct lateral carinae. 



7>/e.— Cat. No. 5698, U. S. Nat. Museum. From St. Paul 

 Island, August 16 (Fur Seal Commission). Two specimens. 



Genus Aphidius Nees. 



TABLE OF SPECIES. 



1. Males 4. 



2. Females. 



Antennae less than 19-iointed 3. 



Antennae 19- jointed. 



Head and thorax black; mandibles and tegulae pale yellowish; legs 

 brownish-yellow ; abdomen rufo-piceous, polished, the petiole black, 

 finely rugulose A. glacialis. 



3. Antennae i6-jointed, the last joint very long, as long as joints 14 



and 15 united. 



Black ; abdomen with its tip and the second dorsal segment at apex yel- 

 lowish ; legs black or piceous black, the sutures of trochanters, ex- 

 treme tips of femora, an annulus at base of tibiae and mandibles, 

 honey-yellow; antennae black, the first joint of flagellum not quite as 

 long as the second, joints 13 to 15 about i^ times as long as thick. 



A. frigidus. 



Antennae 15-jointed, the last joint shorter than joints 13 and 14 

 united. 



Black ; abdomen with the second and third dorsal segments rufo-pice- 

 ous (rarely wholly black) ; legs brownish-yellow or flavo-testaceous, 

 the hind coxae blackish; mandibles and first four joints of antennae 

 yellowish or testaceous ; first five joints of flagellum elongate, nearly 

 six times as long as thick; joint 14 not quite twice as long as thick. 



A. paulensis. 



