OP THE ISLAND OF ST. VINCENT. 141 



of tie thorax fuscous. Antennae 24-jointed, pale, toward the 

 apex fuscous. Wings hyaline, the venation pale, the cubital 

 vein extending from the areolet to the apical margin of wing 

 entirely wanting. 



Hob. St. Vincent. 



Described from a single specimen taken at " sea-level." The 

 species comes nearest to M. americanus, Cr., than to any other 

 of the North-American species ; but can be distinguished from 

 it and other closely allied forms by the annulations on the 

 posterior tarsal joints and the absence of the cubital vein. 



Subfamily Tetphonin^. 

 ExocHTJs, Grav. 



ExOCHirS TEGULARIS, sp. n. 



S. Length 5 millim. Honey-yellow, antennae, a spot on 

 occiput extending forwards jind enclosing ocelli, tegulse, broad 

 band on middle thoracic lobe, spot en the lateral lobes, meta- 

 thorax above, spot on posterior coxse beneath, extreme base of 

 posterior tibiae, and the abdomen above black ; venter and sides 

 of second, third and fourth, fifth and sixth abdominal segments 

 honey-yellow, those on the fourth and fifth meeting above and 

 forming a band. Antennae 30-jointed, straight. Metathorax 

 distinctly areolated. Wings hyaline, the areolet entirely wanting. 



Sah. St. Yincent. 



Described from a single specimen, and seems to come nearest 

 to the Cuban E. validus, Cr. 



Obthocenteus, Grav. 

 * Areolet loanting. 



Okthocentetjs vaeiabilis, sp. n. 



S $ . Length 2 to 3| millim. Black, polished, the face pale, 

 rarely in male entirely black ; mandibles, palpi, and legs yellow- 

 ish white or honey -yellow ; in one specimen only the posterior 

 coxae are black, the femora brown, in another the posterior 

 femora and coxae are brown ; sometimes the posterior femora 

 and the tips of the tibiae are brown. Usually the thorax and 

 abdomen are entirely black, but two or three specimens have 

 the mesonotum pale, and sometimes a pale streak across the 

 second abdominal segment. The antennae are usually 26-jointed 

 in the male, 22- or 24-jointed in the female, black or dusky. 



