ZooL— Vol. II.] WHEELER— DOLICHOPODID^. 21 



upward as a pyramidal elevation bearing the ocelli at its 

 summit. This is so unlike anything I have seen in any other 

 Dolichopodid, that until I have examined more specimens, 

 I suspect that the projection may be abnormal, and desist 

 from founding a new genus. For the present, then, I 

 include both M. aberrans and M. ^etulcus in Fischer's 

 genus. 



1. Scutellum with two bristles .petulcus, sp. nov. 



• Scutellum with four bristles 2 



2. Bright metallic green species aberrans^ sp. nov. 



Species not bright metallic green 3 



3. Bristles above the fore coxae black 4 



Bristles above the fore coxae white 7 



4. Second joint of hind tarsus three times as long as the meta- 



tarsus nigripes Loew. 



Second joint of hind tarsus not more than twice as long as 

 the metatarsus 5 



5. Thorax vittate 6 



Thorax not vittate maurus, sp. nov. 



6. Male with prominent yellow hairs on the tips of hind tibiae. 



viduus, sp. nov. 

 Male without such hairs Aldrichii, sp. nov. 



7. Hind metatarsus of male with a small tooth-like projection. . 8 

 Hind metatarsus of male without such a projection 10 



8. Face below the suture very glabrous, metallic green. 



princeps, sp. nov. 

 Face not glabrous below the suture 9 



9. Distal segment of fifth vein one and one-half times as long 



as the posterior cross-vein veles Loew. 



Distal segment of fifth vein as long as the posterior cross- 

 vein calif orniensis, sp. nov. 



10. Abdomen deep metallic blue cyanogaster, sp. nov. 



Abdomen not deep metallic blue 11 



1 1 . Posterior cross-vein as long or nearly as long as the distal 



segment of the fifth vein 12 



Posterior cross-vein twice as long as the distal segment of 



the fifth vein xerophilus, sp. nov. 



12. Thorax trivittate aurivittatus, sp. nov. 



Thorax not vittate appendiculatus, sp. nov. 



21. Medeterus petulcus, sp. nov. 



Male. Length 2 mm.; length of wing 2-2.5 "^fn- Proboscis moderate, 

 glabrous, black with white hairs. Face thickly covered with light gray dust. 

 Antennas black, first and second joints of the usual form, third joint missing 

 in the specimen. Front dusted with gray, produced into a high four-sided 



