[131] HYMENOPTERA 137 



the second, the latter being only about two-fifths the length of the 

 third and the shortest joint, while the last joint is compressed and a 

 little shorter than the third. 



Type. Cat. No. 5723, U. S. Nat. Museum. From Kodiak, July 

 20. Two specimens. 



Family ANDRENIDJE. 

 Genus Andrena Latreille. 



ANDRENA FRIGIDA Smith. 



Andrena frigida SMITH, Cat. Hym. Brit. Mus., i,p. 115, , 1853. PROVAN-. 

 CHER, Nat. Can., xin, p. 195, 1882. PROVANCHER, Fn. ent. du Can. 

 Hym., p. 795, 1883. CRESSON, Syn. Hym. North Am., p. 293, 1887. 

 DALLA TORRE, Cat. Hym., x, p. 125, 1896. 



Male. Length 8 mm. Black, clothed with a long sparse whitish 

 pubescence ; tarsi with a dark rufo-piceous tinge beneath ; mandibles 

 long, decussate and with a prominent process beneath at base, head 

 transverse wider than the thorax, viewed from above obtrapezoidal, 

 the occiput rather broadly concave, the temple much broadened below 

 and, as seen from the side, forming an acute angle with the base of the 

 mandibles ; malar space very short ; face rather closely punctate, the 

 vertex between the eyes and the lateral ocelli and towards the base of 

 the antenna? longitudinally aciculate, the temples shining although 

 faintly coriaceous ; thorax above opaque, alutaceous, impunctate ; meta- 

 thorax finely coriaceous without vestige of carinae. Wings hyaline, the 

 stigma and veins brown, the tegulae piceous. Abdomen long oval, a 

 little longer than the head and thorax united, apparently smooth and 

 shining, but with a strong lens exhibiting numerous microscopic trans- 

 verse lineations, the first and second dorsal segments clothed with long 

 whitish hairs, the hairs on the following segments sparser and confined 

 more particularly to the lateral margins. 



Type female in British Museum, male in U. S. Nat. Museum. 

 From Muir Inlet, June n ; Sitka, June 16. 



Superfamily II. SPHECOIDEA Ashmead. 



Family CRABRONIDJE. 

 Subfamily CRABRONIN^. 



Genus Ectemnius Dahlbom. 

 ECTEMNIUS PARVULUS (Packard). 



Crabro parvulus PACKARD, Proc. Ent. Soc. Phila., vi, p. 108, $, 1867. 

 CRESSON, Syn. Hym. North Am., p. 285, 1887. Fox, Trans. Am. Ent. 



