HYMENOPTEROUS FAMILY STEPHANID^. 767 



half as broad as the snbapical white band. Hind legs with coxae 

 closely trans-striate, subobsoletely above, a few piliferous 

 granules. Femora towards apex above and externally very finely 

 reticulate; the tibiae compressed to beyond middle; metatarsus 

 five times longer than its maximum breadth. Fore wings not 

 reaching apex of second segment. 



Black; head except apices of mandibles, scape, first flagellar 

 joint partly, and hind metatarsus obscurely red ; palpi fuscous. 

 Wings nearly hyaline ; stigma black, basally narrowly pale ; 

 nervures and radix black, tegulpe pale, basally black. 



Length 17 "5 mm. ; terebra 22 mm. 



Habitat: Apipica, Rio Autaz, Brazil, 14.ix.l914. One 5- 



Apparently isolated by the peculiar structure of the neck, but 

 near B. peritanus Enderl. in the elongate neck and small trans- 

 verse fold. 



6. ERrTHROCEPHALUS Cam. 



Megisckus erythrocephalus Cameron (l),p. 421, $ . Stephanus e. 

 Schlett., p. 140, $ . 



5 . Frons transrugose ; occiput longitudinally rugose, with 

 faint central sulcus ; posterior margin of head broadly bordered. 

 Neck longitudinally sulcate, laterally obliquely carinate ; semi- 

 annular trans-striate, posterior margin narrowly smooth. Meso- 

 thorax trans-striate throughout ; scutellum smooth, with three 

 large marginal punctures on each side ; meso- and meta-pleurse 

 and median segment alutaceous, with difi"use large punctuies, the 

 two latter separated by a sulcus. Petiole trans-sti-iate, longer 

 than rest of abdomen ; second segment basally coarsely trans- 

 rugose, thence and basal two-thirds of third discally longitudi- 

 nally aciculate and dull, remaining segments smooth. Terebra 

 slightly longer than body, sheaths white-banded before apex. 

 Hind legs with coxae coai-sely trans-striate: femora smooth, 

 bidentate ; tibiae constricted in basal third, apical third felted 

 beneath. 



Black ; head red. Wings hyaline, stigma and nervures black. 



Length 19 mm.; abdomen 13 mm.: petiole 7 mm,; terebra 

 20 mm. 



Habitat : Buguba, Panama. Type in British Museum. 



Closely allied to M. collarifer Schlett., but sufiiciently distin- 

 guished by the less developed posterior margin of head and 

 shorter terebra. 



7. TENER Schlett. 



Stephanus tener Schlett., p. 142, $ ; Roman (2), p. 7, $ cJ . 



$. Frons finely arcuate rugose; occiput finely longitudinally 

 to obliquely rugose, more transversely near posterior ocelli ; 

 tlie three anterior frontal tubercles very prominent ; posterior 

 margin of head produced into a short but distinct and trans- 

 lucent collar ; cheeks scarcely as long as scape. Second flagellar 



