ODONTOBRACON. 385 



Petiole depressed behind, the depression margined round the apex; rather strongly 

 longitudinally striated ; an oblique, rather broad, but not deep, furrow on either side at 

 the apex. The separation of the petiole from the second segment marked by a broad 

 and deep furrow, from either side of which branches off a wider oblique furrow, the latter 

 nearly uniting the deeper furrow with the large, broad, suturiform articulation ; the 

 central part of the second segment is thus surrounded by furrows, and is longitudinally 

 striolated, except at the apex ; the suturiform articulation is similarly striolated, and a 

 little beyond it is a shallow, narrow, transverse furrow, the furrow being more finely 

 striated. The apex of the abdomen is rather sharply pointed and bent downwards. 

 Legs stout ; the coxae and femora sparsely clothed with hair ; the tibiae and tarsi much 

 more densely covered with long, stiff hairs ; the tooth on the hind coxge long and 

 curved. The recurrent nervure is scarcely interstitial; the first transverse cubital 

 nervure is very oblique, the second straight ; the second cubital cellule is, on the lower 

 side, nearly twice the length of the second recurrent nervure. 



n/ 



2. Odontobracon crassiventris. (Tab. XV. fig. 15, $ .) 



Niger, metanoto abdomineque rufis ; alia fumatis, basi fere hyalinis. $ . 

 Long. 15 millim. ; terebra 8 millim. 



Hah. Guatemala, San Geronimo (Champion). 



Antennae not much longer than the body, covered with a depressed pile. Face 

 rugosely punctured, a shining, smooth, elongated, narrow space in the centre ; front 

 broadly depressed, a broad keel in the middle. Pro- and mesothorax smooth, shining, 

 the sutures wide and deep ; the pronotum deeply excavated, the excavation coarsely 

 crenulated ; middle lobe of the mesonotum largely developed, especially in front ; scu- 

 tellum with the depression at the base, and its sides, crenulated. Metanotum with the 

 base shining, impunctate, the rest covered with large, widely separated punctures ; at the 

 centre of the base is a stout keel, which reaches to the middle ; the apex has an oblique 

 slope ; the metapleurae are not nearly so strongly punctured as the metanotum ; the 

 lateral tubercles are longer than broad. Petiole strongly longitudinally striolated ; the 

 base excavated, margined laterally. The second segment and suturiform articulation 

 as in 0. montanus ; but the central part is more rounded at the apex (not being so 

 transverse), and the striation is continued to the narrow, shallow furrow ; a little beyond 

 this latter is a similar curved, shallow, striated furrow, which at the sides bends back- 

 wards, so that the two furrows become nearly joined. There is an indistinct transverse 

 narrow striated band on the fifth and sixth segments. 



V — "T 3. Odontobracon nigriceps. (Tab. XV. fig. 16, $ .) 



Rufus, antennis, capite pedibusque nigris j alis fumatis. $ . 

 Long. 11 millim. ; terebra 2 millim. 



Hab. Guatemala, San Geronimo (Champion). 

 biol. centk.-amee., Hymenopt., March 1887. 3dd 



