500 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxi. 



i6. SIREX ANTENNATUS, new species. 



Female. — Lengtli, including sheath, 27 to 32 mm. ; expanse, 35 to 40 

 mm. ; a slender species; head and thorax clothed with long black hairs; 

 abdomen nearly smooth, very minutely and finely punctured, scarcely 

 shining; apex of terminal segment produced in a spatulate-shaped 

 projection 3 to 4 mm. in length, serrated on the edges on apical half; 

 sheath projecting free from body 9 to 11 mm.; ovipositor proper 15 to 

 18mm. long; claws with strong inner tooth projecting nearly at right 

 angles; antennae 22-jointed. Color, black or very dark brown; face 

 and region beneath antenna? slightly inclined to reddish; large oval 

 spot back of compound eyes, joints 12 to 17 of antenniTe, outer half of 

 basal plate, small spot on the side of the sixth abdominal segment, and 

 on base of ninth interrupted centrally, spot on each side of the termi- 

 nal segment, bases of tibia? and bases of metatarsal joints, white; 

 wings very slightly yellowish, nearly hyaline, veins dark brown. 



Type.—^o. 3830, U.S.N.M. 



Described from two specimens. (Giba), (No. 29). 



17. RHOGOGASTERA VIRIDIS Linnaeus. 



Tenthredo viridis Linnjeus, Syst. Nat., 10th ed., 1758, 1, p. 557. 



Tenthredo scalaris Klug, Mag. Ges. naturforsch. Freunde, Berlin, 1814, VIII, p. 194, 



female and male. 

 Tenthredo scalaris Smith, Trans. Ent. Soc. Lond., 1874, p. 382. 

 Bhogogastera viridis KoNOW, Dinitsclie Ent. Zeit., 1884, XXVIII, p. 338. 



Believed by Smith to be identical with the old Linnreus species, which 

 has a very long bibliography. (Collected at Ibuki), (No. 15). 



18. TENTHREDO FLAVIDA, new species. 



Female. — Length, 14 to 15 mm.; expanse, 33 mm.; rather slender, 

 head as broad ,as thorax, abdomen much constricted basally; clypeus 

 very broadly, deeply, and circularly notched; lateral lobes very narrow 

 and elongate; labrum longer than wide, fringed with long yellow hairs; 

 claws evenly, deeply notched; sheath narrow elongate, regularly 

 rounded at apex. Color, light yellowish, more or less marked with yel- 

 lowish brown: joints 3 to 6 of antenna;, brown; mesothorax somewhat 

 brownish, also apices of the first segments and all of fourth and fifth 

 and more or less of terminal segments of abdomeu ; jjosterior femora 

 yellowish brown except apical third; tibia? and tarsi also yellowish 

 brown; j)osterior femora and all tibite externally more or less distinctly 

 marked with a line of black or dark brown; sutures of thorax for the 

 most i)art marked with dark lines; wings nearly hyaline, yellowish; 

 costa and stigma yellow, veins dark brown. 



31ale. — Length, 13 mm.; expanse, 25 mm.; general characteristics as 

 in female, both in structural and colorational features. The antennae 

 are, however, wholly brown except the two basal joints. 



Type.—^o. 3831, U.S.N.M. 



Described from three specimens, two females and one male. (No 

 label), (No. 6). 



