18 MK. SMITH S CATALOGUE OF HTMENOPTEEOUS INSECTS 



sions, and the head much less compressed than in Larrada ; the 

 recurrent nervures are received nearer to the hase and apex of the 

 second submarginal cell; the species have, in fact, a distinct habit, and 

 do not assimilate with the species of Larrada. 



Q-enus Tachttes, Panz, 



1. Tachytes morosus. T. niger, scutello abdomineque nitidis, facie 

 argenteo-pilosa ; marginibus lateralibus abdominis segmentorum 

 argentatis. 



Female. Length 4^ lines. Black ; the face covered with silvery pile ; 

 the thorax finely and very closely punctured ; the metathorax opake 

 and finely rugose, thinly covered with cinereous pubescence; the 

 anterior tarsi ciliated on the exterior, and the intermediate and pos- 

 terior tibiae with a few dispersed spines; wings fusco-hyaline and 

 iridescent, the nervures fusco-ferruginous, the costal nervure black. 

 Abdomen smooth and shining ; the apical margins of the intermediate 

 segments slightly depressed, with the sides sericeous. 



Fam. CEABEONIDtE. 



Genus Oxybeltts, Latr. 



1. Oxybelus agilis. Smith, Cat. Hym. Ins. pt. iv. 387- 2b. 

 Hab, India, Celebes. 



Genus Ceabro, Latr. 



1. Crabro (Rhopalum) agilis. C. obscuro-nigra, clypeo argentato, 

 capite, thorace abdomineque flavo variis. 



Female. Length 4 lines. Black, opake; head larger than the thorax, 

 quadrate ; the ocelli in a curve on the vertex ; the clypeus and lower 

 portion of the cheeks with silvery pile ; the scape, two basal joints 

 of the flagellum, the palpi, and the mandibles, yellow; the latter 

 rufo-piceous at their apex. The margin of the prothorax, the 

 tubercles, the scutellura, the tibiae and tarsi, the anterior femora and 

 the intermediate pair at their apex yellow ; the anterior femora black 

 above ; the wings subhyaline and iridescent, the nervures testaceous. 

 Abdomen : with an elongate clavate petiole ; the first segment with 

 an oblique yellow macula on each side, the third with a large lateral 

 macula at its base, and the following segments entirely yellow. 



Hab. Celebes. 



This species closely resembles the C. Westermanni of Dahlbome, from the 

 Cape of Good Hope. 



Genus Cerceris, Latr. 



\. Cerceris instabihs. Smith, Cat. Hym. Ins. pt. iv. 452. 74. 

 Hab. India, China, Celebes. 



