138 ME. W. H. ASH ME AD ON THE PARASITIC HTMENOPTEEA 



two basal joints pale beneath, the second witb a pale ring at 

 apex ; funicle-joints about two and a half times as long as thick^ 

 the last a little longer than the first. Wings hyaline, the vena- 

 tion pale brown, the second branch of the stigmal vein longer 

 than the transverse cubitus. 



Eab. St. Vincent. 



Described from a single specimen taken at 1500 feet altitude. 



Eamily ICHNEUMONID^E. 



Subfamily CuTPTiisriE. 



Mesostenus, Grav. 

 Mesostekus insulaeis, sp. n. 



S $. Length 5 to 10 millim. ; ovipositor 3 to 3| millim. 

 Head, antennae, thorax, and ovipositor black ; the orbits broadly, 

 cheeks, face below antennse, clypeus, labrum, spot at base of 

 mandibles, palpi, a broad annulus on antennae, upper margin of 

 collar, spot before front coxae, anterior and middle coxae and 

 trochanters, spot on posterior coxae behind at base, tegulae, spot 

 below, second joint of posterior tarsi, and scutellum white. Legs- 

 and abdomen rufous, the tarsi black or fuscous. Head smooth, 

 impunctured, with a central carina from front ocellus. Thorax 

 shining, sparsely punctate, the parapsidal furrows distinct, 

 crenulated, the middle lobe with longitudinal striae posteriorly ^ 

 metathorax with two transverse keels, the posterior angles 

 slightly compressedly toothed, the enclosed space at base smooth^, 

 the space between the first and second transverse keels coarsely 

 longitudinally striated, the posterior face very coarsely rugose, 

 metapleura with coarse transverse striae. The mesopleura below 

 and the metathorax more or less densely covered with a glitter- 

 ing white, appressed pubescence. "Wings hyaline, the venation 

 piceous, the areolet quadrate. Abdomen with three basal seg- 

 ments, finely microscopically punctulate. In the male the 

 annulus on the antennae is narrower, the white spot at base of 

 posterior coxae wanting ; the second, third, and fourth joints of 

 posterior tibiae are usually white, although sometimes only the 

 second joint is white or the first partially white, and in a single 

 case the tarsi are wholly dusky. The metathorax is more rounded 

 behind than in the female, the lateral angles not at all toothedy. 

 while the abdomen is smooth, impunctured. 

 Sab. St. Vincent. 



