ALDRICH : DOLICHOPODID.K OF GRENADA, W. I. 77 



PARACLIUS. 



Loew, Monogr., 97, lf<64 ( iioii Bigot). 



The relationships of Paraclius, Pelastoneurus and Sarcionus 

 are somewhat puzzling. I have considered as belonging to Pe- 

 lastoneurus those species only which have the face broad in both 

 sexes, with a slight concavity in the upper part and a marked 

 convexity below. The arista is distinctly plumose. The 

 fourth vein in its last part converges toward the third with 

 more or less abruptness, but I do not regard this as the essen- 

 tial character. Sarcionus includes species with narrow face, 

 comprising in the male about a tenth the width of the head ; it 

 is but little, if any, convex below; the arista is plumose. In 

 the female the face is about a sixth the width of the head, and 

 has more resemblance to that of Pelastoneurus. The fourth vein 

 converges strongly toward the third in the latter part of its 

 course. In Paraclius the face is like Sarcionus, but the 

 arista is bare or only moderately pubescent. The fourth vein 

 near its end makes a somewhat sudden curve toward the third, 

 then gradually resumes its former course, forming a curve with 

 its concavity outward ; this is quite variable in shape, and in at 

 least one species there is no marked concavity, as in Pelastoneu- 

 rus vagans. The characters of the face and arista seem most 

 substantial. 



Table of North American and West Indian Species of Paraclius. 



1 s Front femora black 2 



' ( Front femora yellow 5 



a \ Tibia? all black, costa not thickened nigripes, n. sp. 



~\ Tibia? not all black, or else costa conspicuously thickened 3 



( First section of costa greatly thickened in male, mod- 



3. ] erately in female albonotatus Loew. 



( First section of costa not thickened 4 



, ( Hind tibia? yellow fusclcornis, n. sp. 



' I Hind tibia? mostly black pum'dio Loew. 



r ( Antenna? black arcuatus Loew. 



° ' I Antenna? chiefly yellow 6 



„ \ Arista in the male enlarged at tip, disk-like 1 



' j Arista in the male not enlarged at tip 8 



7 \ Arista long, tapering, thin di&cifer, n. sp. 



* } Arista quite short, thick claviculains Loew. 



i Two velvet-black spots between the root of the wing 



8. •] and the humerus quadrinotatus, n. sp. 



( Only one spot 9 



( Dorsum of thorax wholly deep green on anterior part 10 



9. ] Dorsum of thorax with a bronze stripe between acrostichal 



( bristles filiferus Aid. 



( The curve of fourth vein occurs half-way between the pos- 



10 . ] terior cross- vein and the apex venustus, n. sp. 



( The curve occurs two-thirds of the way to the tip bellus, n. sp. 



