178 ME. W. H. ASHMEAD ON THE PAEASITIC HYMENOPTEBA 



Chetsocharodes petiolata, sp. n. 



S $• Length 1*1 miilim. Blue-black, upper part of thorax 

 and base of abdomen with a metallic tinge ; disk of thorax scaly- 

 punctate ; metapleura and coxse bluish ; legs brownish yellow } 

 antennge, including scape, black or dark brown ; flagellum once 

 and a half as long as the scape, pubescent, the second funicle-joint 

 a little longer than the first; club 3-jointed, fusiform, distinctly 

 separated from the funicle. "Wings hyaline, ciliated, the short 

 stigmal vein ending in a small round stigma with an uncus. 

 Abdomen oval, two thirds the length of the thorax, the petiole 

 once and a half as long as wide, shagreened. 



The male is at once distinguished from the female by the 

 antennae, the funicle being 3-jointed, the joints pedicellate at 

 tips and with whorled hairs ; club 2-jointed ; thorax above golden 

 green, scaly ; while the abdomen is oblong, with the petiole fully 

 twice as long as wide. 



Sab. St. Vincent. 



Described from one male and one female specimen. 



Subfamily Teteastichust^. 

 Ceeatonetjea, gen. nov. 



Antennse 10-jointed; in female subclavate, with two ring-joints 

 and a 3-jointed club, covered with a fine pubescence: in male 

 filiform, with one ring-joint and a 4-jointed funicle, the funicle- 

 joints contracted toward apex and with long hairs. Head trans- 

 verse; the ocelli subtriangularly arranged, the laterals being^ 

 much closer to the front ocellus than to the margin of the eye : 

 eyes broadly oval ; frons with two grooves for the scapes of the 

 antennge. Thorax subovoid, the pronotum short, the mesonotum 

 without a median furrow ; the scutellum convex, without the 

 grooved lines on disk; the metathorax very short, smooth,, 

 rounded behind, with a delicate median carina. Wings, except 

 the posterior pair, as in Tetrastichus ; hind wings with a long, 

 clavate marginal vein. Abdomen briefly but distinctly petiolated, 

 in female ovate, pointed at tip, in male oval. 



In the distinct petiole, and in other characters pointed out, 

 this genus is quite distinct from all others placed in this group.. 

 The female antennse agree with Tetrastichus, Hal. ; but the male 

 antennse are different, and the w^holly different mesonotum and 

 scutellum readily separate it. The other genera having no- 



