[245] HYMENOPTERA 25 1 



4. Antennffi 21-jointed, or less 5* 



Antennae 22-jointed. 



Black ; abdomen with the second dorsal segment rufo-piceous at apex ; 

 mandibles rufo-piceous ; palpi fuscous ; metanotum smooth, without 

 a median carina, the apical transverse carina alone present. 



A. fropinquus. 



5. Antennas i8-jointed 6. 



Antennae 21-jointed. 



Black; mandibles reddish; palpi blackish; metanotum smooth but with 

 a median carina ; legs mostly black, with an annulus at base of tibiae 

 and their extreme apices usually honey-yellow or testaceous. 



A. frigidus. 



6. Black ; abdomen with the apex of the petiole and sometimes more or 

 less of the second segment rufo-testaceous, more yellowish in the 

 sutures ; femora and tibiae above, and especially the middle hind pairs, 

 fuscous, the coxae black or rufo-piceous ; metonotum short, with a 

 diamond-shaped areola A. paulensis. 



APHIDIUS PROPINQUUS sp. nov. 



Male. — Length 3.3 mm. Polished black; mandibles reddish; 

 palpi fuscous ; legs, except a reddish piceous tinge at the sutures of 

 joints, entirely black ; abdomen, except a reddish or rufo-piceous band 

 at apex of the second dorsal segment black. Antennae 22-jointed, the 

 joints of the flagellum delicately fluted and not more than twice longer 

 than thick. Metanotum smooth with only the apical transverse carina 

 present. Wings hyaline, veins brown, stigma yellowish or pale within. 



Type. — Cat. No. 5699, U. S. Nat. Museum. From St. Paul Is- 

 land, August 8, 20 (Fur Seal Commission). Two specimens. 



APHIDIUS GLACIALIS sp. nov. 



Female. — Length 2.8 mm. Head and thorax black, smooth and 

 shining; abdomen, except the first segment dark rufous or rufo- 

 piceous ; mandibles, mouth parts, annulus at base of flagellum, tegulcE, 

 and the front coxae and trochanters, pale yellowish ; remainder of legs 

 brownish-yellow, the basal joint of the middle tarsi scarcely longer 

 than joints 2 and 3 united, the basal joint of hind tarsi nearly as long 

 as all the other joints united. 



The antennae are 19-jointed, black, shorter than the body, the third 

 joint being about four times as long as thick. Abdomen rufo-piceous, 

 smooth and shining, except the first segment which is black, finely 

 rugulose and fully thrice as long as thick. 



Type. — Cat. No. 57oo» U. S. Nat. Museum. From Juneau, July 

 25. One specimen. 



