424 HTMENOPTERA. 



1. Middle discoidal cellules separated. 



1. Gasteruption maculicorne. (Tab. XVIII. fig. 5, $ .) 



Nigrum, opacum, tegulis, apice antennarum, tibiis femoribusque anterioribus rufo-testaceis, tarsis late medio 



basique tibiarum albis ; alis fere fumatis ; $ terebra quam corpus fere longiore. 

 Long. 19 millim. ; terebra 18 millim. 



Eab. Guatemala, Calderas 6000 feet (Champion). 



Antennse with the apical three joints entirely, and the twelfth joint on the underside, 

 rufous ; the second and third joints united longer than the scape. Head opaque, nearly 

 alutaceous ; the palpi testaceous, except at the apex ; the cheeks scarcely so long as the 

 second antennal joint; the space between the hind ocelli not much greater than the 

 length of the second antennal joint, and separated from the eyes by about an equal 

 distance. Pronotum elongated, double the lateral depth, opaque, shagreened, except 

 laterally behind ; mesonotum finely transversely striated, behind finely rugosely punc- 

 tured ; scutellum finely, longitudinally rugosely punctured ; pleura? finely rugosely 

 punctured ; metanotum coarsely transversely rugose. Hind coxse shining, finely, trans- 

 versely striated ; hind tibia? broadly thickened, opaque, shagreened ; metatarsus a little 

 longer than the other joints united. 



From the following species G. maculicorne differs in being larger, in the terebra 

 being much longer, &c. 



2. Gasteruption tenuicolle. 



Gasteruption tenuicolle, Schletterer, Verb., zool.-bot. Ges. Wien, xxxv. p. 291 (1885) \ 

 Eab. Mexico, Orizaba (Bilimek l ). 



2. Middle discoidal cellules united, the nervure being obsolete. 



3. Gasteruption sericeum. (Tab. XVIII. figg. 3 $ , 4 s .) 



Nigrum, argenteo pilosum, basi tarsorum anterioribus basique tibiarum albis, abdomine lateribus tegulisque rufo- 

 testaceis ; $ terebra quam dimidio abdomen longiore. $ $ . 

 Long. 11-13 millim. ; terebra 5-6 millim. 



Hob. Guatemala, San Geronimo (Champion). 



Flagellum rather attenuated at the base ; the third joint equal in length to, if not 

 shorter than, the first and second joints united, and shorter than the fourth joint. 

 Head in the centre (except on the front), and on the vertex, densely covered with 

 a close silvery-white pubescence, impunctate, the vertex shining ; the cheeks a little 

 shorter than the second joint of the antennae ; the hinder ocelli separated from each 

 other by a space about equalling the length of the scape, and from the eyes by about 

 the length of the second joint. Prothorax short, not much longer than its lateral 

 depth, covered with a thick close silky pile ; above finely rugose. Mesonotum opaque, 



