222 PROCEEDINGS OP THE ACADEMY OP 



Rhamphidia Meig. 



Proboscis elongated, but shorter than the thorax. Palpi inserted at the tip 

 of the proboscis, of moderate length, last joint elongated ; front narrow ; an- 

 tennae 10-jointed, not reaching the base of the wings ; first joint cylindrical, 

 elongated ; second cyathiform, short ; the following joints subcylindrical short, 

 becoming more elongated towards the tip of the antennae ; verticils moderately 

 long. Wings with a distinct mediastinal vein and a cross-vein near its tip ; 

 one radial area, a discal and no petiolated areolet ; no stigmatical cross-vein. 

 (The neuration is like Meig. vol. i. tab. vi. f. 6, or Schummel, tab. i. f. 1.) 

 Feet long, slender ; without spurs at the tip of the tibiae ; ungues smooth be- 

 neath ; tarsi without distinct pulvilli. Forceps of the male somewhat similar 

 to that of Elephantomyia. 



I refer to this genus a male specimen from Wisconsin, which agrees with 

 the characters of Rhamphidia as given by Meigen and Walker (Ins. Brit. 

 Dipt. iii. p. 308.) Only Mr. Walker describes the tibiae as armed with very 

 short spurs. A careful examination convinced me that they are unarmed, al- 

 though there are some bristles at their tip which might be mistaken for spurs. 

 The absence of the stigmatical cross-vein, expressly mentioned by Schummel 

 in his description of R. longirostris (Schum. Limnobia, p. 103, ) is suffi- 

 cient in my opinion to settle the question of the generic identity. 



The close relation between this genus and Elephantomyia is evident. 

 The comparatively short proboscis, the structure of the palpi and of the 

 second joint of the antennae, seem to be the only differences. The neuration 

 of the wings, including the absence of the stigmatical cross-veins, is exactly 

 the same ; the little cross-vein between the pobrachial and anal veins, appa- 

 rent on the wing of Elephantomyia, is concealed by a fold in my speci- 

 men of Rhamphidia; still it can be distinctly seen by holding the wing in 

 a certain direction. R. brevirostris bears, besides, a most striking re- 

 semblance to Eleph. canadensis in the coloring of the body and the wings ; 

 the wing of the former is only a little more hyaline, and for this reason the 

 dusky spot at the tip is more apparent ; the stigma is less oblong, more square, 

 and the tibiae are black at the tip, whereas those of E. canadensis are not 

 even infuscated. 



The proboscis of R. brevirostris seems to be much shorter than that of 

 the European R. 1 ongiros t ris, (judging from the descriptions of the 

 latter. ) 



R. brevirostris. Silacea, praescuto et abdomine infuscatis ; alis hya- 

 linis, apice infuscato, stigmate fusco ; pedibus pallidis ; apicibus femorum, 

 tibiarumque nigris ; long. lin. 2|. 



Head cinereous ; proboscis but little longer than the head, fuscous ; palpi 

 fuscous ; antennae fuscous at the base ; flagelluru paler. Thorax ochraceous- 

 yellow ; praescutum infuscated ; the usual stripes but indistinctly marked ; 

 halteres pale ; feet pale yellow ; tips of the femora and tibiae black ; tips ot 

 tarsi also darker. Abdomen yellow ; the anterior part of the segments infus- 

 cated ; last segments and genitals fuscous. Wings hyaline, infuscated at tip ; 

 stigma brown, nearly square; the anterior part of the pobrachial vein ,also 

 infuscated ; veins brown ; costal and subcostal veins yellow. 



Single tf specimen, brought from Wisconsin by Mr. Ulke. 



This species might possibly be R. prominens Walk., (Dipt. Saund. v. p. 

 435) although the description disagrees in several points. Rhamphidia fi a v i- 

 p e s Macq., (Dipt. Exot. Suppl. v, p. 17,) is described as having thorax and 

 abdomen brownish ("fuscana ;") in other respects Macquart's description 

 agrees well with my R. brevirostris. 



Teucholabis nob. 



Wings broad and rather short ; posterior margin rounded ; mediastinal vein 



[Aug. 



