P. CAMERON. HYMEN OPTERA. 219 



with fulvous and lined with black above, the tarsi infuscated; the hind legs black, more than 

 the basai half of the hind coxae, the mark widened laterally and extending along the middle 

 of the sides to the apex, the sides below and underside of the femora, the basai three-fourths 

 of the tibiae below, the basai third of the metatarsus and the folio wing 3 joints, whitish 

 yellow. Wings hyaline, the nervures and stigma black, the areolet small, narrow, of equal 

 width, twice longer than wide, receiving the récurrent nervure near the apex. Ç. 



Length 17 m. m., terebra S m. m. 



A long, slenderly built species, with the abdomen twice the length of the head and 

 thorax united, the abdominal pétiole long and slender, the post-petiole not much widened, 

 of equal width, twice longer than wide. Thorax 4 times longer than wide, the metathorax 

 with a rounded apical slope, the spiracles about 4 times longer than wide. Parapsidal furrows 

 indistinct, narrow, on the basai slope only, crenulated. Metanotum closely, strongly transversely 

 striated, the striae extending to the pleural keel. The central dépression on the propleurae 

 and the apex more closely and widely, the mesopleurae obliquely below the apex of the 

 raised central part, the apex and the metapleurae more strongly, closely and obliquely, 

 striated. Eyes large, projecting, a little converging below. 



5. Mesostenus Tosquinetï sp. n. 



Bivak Island, January. 



Black, shining, smooth, except for a striated belt in the middle of the propleurae, an 

 irregular striated-punctured oblique band on the lower part of the mesopleurae, the metapleurae 

 which are closely, distinctly punctured, more weakly at the base than elsewhere, the basai 

 part of the metanotum closely, less strongly punctured, the rest closely transversely striated, 

 more strongly and widely in the centre and apex, less strongly, more closely and obliquely 

 on the sides at the base ; and the 2 nd abdominal segment, which is finely, closely, weakly 

 punctured. The following markings are whitish yellow: a semicircular mark on the sides of 

 the vertex, palpi, tegulae, scutellum, a longish conical mark behind the hind wings, a large 

 mark in the middle of the metanotum, extending from the keel to the apex, the base trans- 

 verse, it becomes gradually widened, but not much to near the apex, then roundly narrowed ; 

 the tubercles, a squarish mark, rounded at the base, a little dilated in the middle above and 

 below, in the middle of the apex of the mesopleurae, the basai half of the ist abdominal 

 segment, a band on the apex, the black part with its apex roundly dilated in the middle, 

 and it does not extend to the outer edge, a band on the apices of the 2 nd and yà, that on 

 the latter more contracted at the base, and a much broader band on the apex of the penul- 

 timate, pallid yellow. The 6 th to 9A antennal joints white. Wings hyaline, the stigma and nervures 

 black, the apex slightly narrowly clouded, the areolet small, square, the outer nervure faint. Q. 



Length 16 m. m., terebra 5 m. m. 



A stout robust looking species. 



6. Mesostenus basiornatus sp. n. 



Alkmaar, November. 

 Black, the palpi, the io* to 17A antennal joints, a large mark between the ocelli and 

 the eyes, obliquely narrowed at base and apex, the scutellum, a broad continuous band near 



