DOLICHOPUS. 23 



19. distractus Walk. Walker says nothing about the sex of the de- 



scribed specimen ; it seems to have been a female. The descrip- 

 tion does not afford any data for even an approximative identifica- 

 tion. 



20. discessus Walk. Mr. Walker gives a very unsatisfactory descrip- 



tion of a female. It is a rather surprising datum that the upper 

 side of the thorax has two longitudinal coppery-red stripes, whereas 

 all the species known to me, and marked with stripes of this color, 

 have always three, that is, a narrow intermediate one, and two 

 broad lateral ones. This character might perhaps serve as a clue 

 for identification. 



21. contiguus Walk. Nothing is said about the color of the cilia of the 



inferior orbit. If they are black, then it is certain that D. contiguus 

 is not among the species from North America known to me. If 

 they are pale, it still remains to be known of what color are the 

 cilia of the tegulse about which Mr. Walker is also silent. Sup- 

 posing that they are pale, then D. splefididus would have to be 

 taken in consideration ; but its male has fringed hind femora and 

 cannot therefore be identified with D. contiguus. If the cilia of the 

 tegulse are black then we would have to compare 13. discifer and 

 lobatus. But the last joint of the fore tarsi of D. discifer is not at 

 all much enlarged, and forms only a small pallet ; therefore it can- 

 not be taken for D. contiguus. D. lobatus has a very much enlarged 

 last joint of the male fore tarsi, but as the first joint of the antennae 

 is red and only slightly dusky on the upper edge, and as the 

 lamellae of the hypopygium have a broad black margin, whereas 

 Walker describes the lamellae of D. contiguus simply as whitish, as 

 the wings of D. lobatus, in the male sex, are distinguished by their 

 peculiar shape, which is not mentioned in the description of D. con- 

 tiguus, on account of all this we cannot consider these species as 

 being identical. 



22. exclusus Walk. Very poorly described from a female, so that all 



effort to identify the species must remain fruitless. 



23. confinis Walk. The same may be said of this species. 



24. conterminus Walk. Mr. Walker does not mention the color of the 



cilia on the tegube, and this renders the identification impossible. 

 If they are black, then the species is not among those known to me. 

 D. discifer and D. lobatus are here again the species with which Mr. 

 Walker's description agrees in most particulars, but both are easily 

 distinguished by the absence of fringe on the hind femora of the 

 male. If, on the contrary, the cilia of the tegulpe of D. conterminus 

 are pale, then D. splendidus might possibly be identified with i.t, 

 although it must be admitted that the coloring of this species as 

 well as some other characters, somewhat disagree with Mr. AYalker.s 

 description. 



