and Characters of undescribed Species. 349 



pedes obscure rufi, femoribus posticis nigris dentatis, tibiis 

 posticis unituberculatis ; alae cinereae, angustse. 



Male, — Black, comparatively slender. Head and thorax largely 

 punctured, but not dull nor pubescent as in nearly all the species 

 of this family. Head not impressed in front ; face smooth, flat, 

 very oblique. Antennae red, nearly filiform, inserted by the mouth, 

 shorter than the thorax ; scape about two-thirds of the length of 

 the flagellum. Thorax sliglitly convex, with the usual structure ; 

 hind border of the prothorax reddish on each side ; scutellum un- 

 armed. Petiole linear, striated longitudinally, almost as long as 

 the abdomen. Abdomen elliptical, slightly compressed, deeper 

 than broad; first segment occupying five-sixths of the surface. 

 Legs dark red ; hind-coxae and hind-femora mostly black, the 

 former nearly as large as the latter, which areincrassated and have 

 a short obtuse tooth at the base, and many extremely minute 

 teeth ; hind-tibise with a protuberance above, near the base. 

 Wings cinereous, narrow ; veins black ; ulna almost three-fourths 

 of the length of the humerus; radius and stigma obsolete; 

 cubitus very short, forming a very acute angle with the costa. 



Length of the body 4 lines ; of the wings 6 lines. 



Makessar, Celebes. Discovered by Mr. Wallace. In the British 

 Museum. 



Epitranus observator. 



Fcem. — Niger, gracilis ; caput et thorax punctata, nitentia ; 

 caput thorace paullo latius, facie rufescente perobliqu4 ; 

 antennae piceae, filiformes, thorace breviores, scapo rufo ; 

 scutellum inerme; petiolus striatus, elongatus ; abdomen 

 ellipticum, breve, subtus rufescens ; pedes rufi, femoribus 

 posticis nigris dentatis, tibiis posticis unituberculatis ; alae 

 cinereae, angustae. 



Female. — Black, rather slender. Head and thorax largely 

 punctured, but shining. Head a little broader than the thorax, 

 not excavated in front ; face reddish, extremely oblique. Antennae 

 piceous, linear, much shorter than the thorax ; scape red, inserted 

 by the mouth. Thorax with the usual structure ; scutellum un- 

 armed ; raetathorax almost horizontal. Petiole linear, striated 

 longitudinally, almost half the length of the elliptical slightly com- 

 pressed abdomen ; the latter reddish beneath, much shorter than 

 the thorax. Legs red ; hind-femora black, much incrassated, with 

 a short obtuse tooth at the base, and with many extremely minute 

 teeth ; hind-tibiae with a protuberance above near the base.. 

 Wings cinereous, narrow ; veins black ; ulna a little shorter than 



