ORTALID^E TETANOPS. 119 



Gen. II. TETANOPS FALL. 



Charact. Front of a considerable and uniform breadth. Eyes rounded- 

 oval, or oval. Face strongly projecting in profile, more or less 

 retreating below. Clypeus small, but projecting beyond the edge 

 of the mouth. Oral opening comparatively small; proboscis but 

 little incrassated. 



The hairs and bristles on the body remarkably short, especially the 

 bristles of the prothorax much smaller than in any other genus 

 among the Ortalina; thoracic dorsum upon its middle only poste- 

 riorly with a few bristles. 



Antennae short, sometimes strikingly short ; third joint oval, longer 

 than the second. 



First longitudinal vein bristly towards its end only; the crossveius 

 rather distant; the second and third longitudinal veins parallel 

 towards their end, or only gently convergent; posterior angle of 

 the anal cell pointed, but not prolonged in the shape of a lobe. 



The North American species of Tetanops are distinguished 

 from the European ones by the more distinct and sharper ante- 

 rior edge of thejnouth, while in the latter the anterior end of the 

 oral opening hardly shows a distinct margin. As one of the 

 American species, known to me, has, moreover, the vertical 

 diameter of the eyes considerably larger than the European 

 species, I was for some time in doubt, whether it would not be 

 better to separate generically the North American from the 

 European species. Nevertheless, they possess enough characters 

 in common, to render such a separation, at least for the present, 

 unnecessary. Besides the stout head, with the very broad front, 

 the striking bareness of the whole body and the great shortness 

 of the prothoracic bristle, the absence of any picture on the wings, 

 except some very faint spots along the costa, easily distinguishes 

 the species of Tetanops. 



1. T. luridipennis n. sp. $ 9 .(Tab. VIII, f. 17.) Frons praeter 

 vittani niediam punctata ; alse sordide lutescentes, ad costam obsoletis- 

 sime lurido-ruaculatae. 



Front, with the exception of a median stripe, punctate ; wings of a dingy 

 clay-yellow, with very indistinct brownish-clay-yellow spots along the 

 costa. Long. corp. $ , 0.21 ; J cum terebri 0.280.32; long. al. 0.18. 



Head reddish-yellow. The very broad front more red ; it has 

 a small median stripe, which is not pollinose, and has, on each 

 side, a brown border ; the latter sometimes becomes indistinct 



