104 



VESPIDAE. 



3446 Eumenes nicaraguaensis sp. nov. 



Black, the greater part of the eye incision, a narrow line on the top 

 of the outer orbits, a line on the sides of the clypeus above, the basal 

 third of the mandibles, a conical mark above the antennae, its narrow 

 end above, a line along the base of the propleurae, one along the upper 

 edge of the pronotum all round, uniting in the middle with the lower 

 oblique line, a narrow line on the base of the scutellum, post-scutellum, 

 a line on the centre of the narrowed base of the first abdominal segment, 

 a narrow line on its apex, vdth a mark touching the base of the line 

 on the sides and a broader more irregular line on the apex of the second, 

 bright yellow. Wings fuscous, highly iridescent, the nervures and stigma 

 black, the latter shining. The lower part of *the front, eye incision, 

 face and clypeus pale golden, the pubescence on the rest of the body 

 silvery. Male. Length 6 mm. to end of second abdominal segment. 

 Chinandega. 



Front and vertex strongly but not closely punctured except at the 

 sides of the antennae. Antennae stout, a narrow yellow line on the apical 

 half of the scape; the claw stoiit, slightly longer than the apical joint. 

 Clypeus smooth, indistinctly punctured in the middle, the apex distinct- 

 ly projecting in the middle, the projection twice wider than long, its 

 apical half roundly incised. Thorax strongly and moderately closely 

 punctured, except at the base of the metapleurae. Median segment broad- 

 ly rounded, the apex with a steep slope and not furrowed. The oblique 

 furrow on the mesopleurae is deep and clearly defined. Abdominal 

 petiole clearly longer than the head and thorax united, its dilated pyri- 

 form apex about one-fourth shorter than the narrowed basal part, its 

 lower svirfaee is for the greater part sordid yellow, and there is a 

 distinct transverse furrow close to the apex; the second segment cam- 

 panulate, clearly longer than its width at the apex. Legs black, the 

 knees and apex of fore tibiae testaceous. Body shining, polished, the 

 thorax short, cubital in front, globular behind, more than twice the 

 length of the ''pear" of the petiole. Ocelli almost in a straight lino. 

 The second cubital cellule is narrowed in front, not quite half the length 

 it is behind; the third is large and is clearly wider in front than 

 behind. 



Belongs to Saussure's Division Omicron (Syn. of Araer. Wasps, p. 70). 

 It seems to be sufficiently differentiated from ' ' regulus ' ' by the longer 

 clypeus compared with its Width, it being also wider above, not so 

 clearly narrowed and its apex is clearly bidentate. Judging by Saussure's 

 figure (PI. J, f. 7 b) the abdominal petiole is longer compared with 

 the head and thorax; in regulm it is shorter than the head and 

 thorax; in the present species clearly longer than the two combined. 

 The second recurrent nervure is not interstitial as it is in E. toton- 

 acus; in that species, too, the antennal hook is "very small." E 

 aviculus should, inter aila, be known by its strongly punctured 

 abdomen. 



