OP THE ISLAND OF ST. VINCENT. 193 



first flagellar joint, the joints beyond 

 quadrate, a little longer towards the 



tip D. bisulcus, sp. n. 



2. Polished, impunctured ; legs, scape, and pedi- 

 cel honey-yellow ; the second abdominal seg- 

 ment with the tubercles widely separated, 

 placed near the lateral margin. 

 Flagellum filiform, submoniliform, the first 

 flagellar joint very small. 

 Transverse medial nervure nearly straight, 

 slightly curved at tip. 

 Flagellar joints after the first scarcely 



longer than thick D. confusus, sp. n. 



Transverse medial nervure straight. 



Flagellar joints after the first twice as long 



as thick D. politus, sp. n. 



DiSSOMPHALTIS TUBEECULATUS, Sp, n. 



c? . Length 2| millim. Polished black, sHning, very faintly 

 microscopically punctulate, the head with some larger scattered 

 punctures. Mandibles and antennae pale ferruginous, the latter 

 fuscous towards tips. Legs reddish yellow. Head as broad as 

 long; the eyes prominent, oblong oval, bare. Antennge 13- 

 jointed, filiform, extending to the base of the metathorax, covered 

 with a short pubescence ; scape slightly curved, two thirds the 

 length of the eye; pedicel oval, a little longer than the first 

 flagellar joint ; the second flagellar joint and the joints beyond 

 longer than the first, about one and a half times as long as thick. 

 Pronotum contracted anteriorly into a rounded neck, the con- 

 tracted portion finely transversely striated, the posterior portion 

 very short, about one third the length of the mesonotum ; meso- 

 notum with two distinct parapsidal furrows and a grooved line 

 on the scapulae. Scutellum with a long transverse furrow at 

 base. Metathorax scarcely longer than wide, roundedly trun- 

 cate posteriorly, coarsely rugose, with a medial carina. TegulsB 

 yellowish. "Wings subhyaline, pubescent, the venation brown ; 

 the transverse medial nervure is straight, and there are indica- 

 tions of a discoidal cell. Abdomen oval, depressed, subpetiolate, 

 polished black ; the suture between the first and second segments 

 is very strongly arcuate ; the second segment is fully twice as 

 long as the third and bears two, widely separated, rounded, hairy 

 nipples or tubercles, in fovese below its middle; the third and 

 following segments about of an equal length. 



