224 Timehri. 
broad, cup-shaped, the 2nd wider than long ; both are smooth except the apex 
of the 2nd. Apex of post-scutellum bluntly rounded, the middle almost 
transverse. Female. Total length 11 mm. 
Rio Purus, Amazonia. 
(Prof. I. W. H. Trail, F.R.S.) 
The flagellum below and the tips of the mandibles are rufous. Tegule 
black, an irregular spot of testacecus piceous colour on the outer basal half. 
Belongs to the nasideus group from the described species of which it may be 
known by the much more strongly punctured clypeus and by the different 
form of the metanotal keel, which in the other species does not run ina straight 
line to near the middle and does not form a sharp angle above the middle. 
Zethus mexicanus, L. 
—recurvirostris, DeGeer, Saussure, vespides, I, 12, 6-Z. cyanipennis, Erich- 
son, Fauna et Flora British Guiana, III, 590. Demarara (Rev. W. Harper.) 
Zethus caeruleopenms, ¥. 
Saussure, Vespides, I, 10, 2, IIT, 115 Syn. Amer. Wasps., 16. 
T have the var. brasiliensis, Saus., l.c. I, 10, 2, ITI, 115, from Trinidad. 
Zethus .binodis. F. 
Saussure, Syn. Am. Wasps, 54, 50. 
Zethus didymogaster, Spinola, Ann. Soc. Ent. Fr. X, 133 ; Saussure, Le. 55. 
There can be no doubt, as Saussure, suggests, that Spinola has 
described the Male for the Female. The museum specimens is a male. It has 
the clypeus wider than long, its apex bluntly rounded in the middle, with a 
distinct triangular tooth on either side. There is a wide furrow do wn the 
apical half of the scutellum ; it is more widely punctured than the mesonotum. 
Post-scutellum to shortly beyond the middle opaque, much more finely and 
closely punctured than the scutellum, the apex depressed, aciculated, bluntly 
rouaded at the end. The centre and outer edge of the metanotum are bor- 
dered by keels, the outer stouter than the inner; it is smooth at the base 
in the centre, the rest obliquely, irregularly, not very closely striated. The 
narrowed part of the 1st abdominal segment is as long as the narrowed part 
of the 2nd. There is a yellow spot in the eye incision, one on the upper outer 
orbits, and 2 on the apex of post-petiole, the basal the larger, triangular, the 
apical smaller transverse. Wings fuscous violaceous, the hinder paler. The 
apex of the antenne and the apex ofthe fore femora, the tibie and tarsi 
rufous. 
Baeoprymna gen. nov. 
Abdominal petiole of equal width throughout, three-fourths of the length 
of the thorax, the 2nd segment not much shorter than it, much wider than the 
lst, campanulate. Mandibles short, broad, narrowed at the basal third, the 
i 
