88 KANSAS UNIVERSITY SCIENCE BULLETIN. 



Table of North American Species o/Asyndetus. 



i Dorsum of thorax with a broad, brown-dusted middle stripe, 



3. ] enclosed by two bluish-gray ones fratellus Aid. 



( Dorsum not striped interruptus Loew. 



i Second joint of fore tarsi in the male with a large spine, ammophilus Loew. 



4. ] Second joint of fore tarsi in the male with two yel- 



( low processes appendicidatus Loew. 



Note. — The last two are known only from the United States; interruptus is 

 Cuban. 



Asyndetus fratellus. 



Aldrich, Trans. Lond. Entom. Soc, 1896, 332. 



Two males, two females. 



Asyndetus syntomoides. 



Wheeler, Proc. Cal. Acad. Sci., 1899, 32. 



One male, two females. The species ranges as far north as 

 Massachusetts, and west to Kansas. 



CHRYSOTUS. 



Meigen, Syst. Beschr., IV, 40, 1824. 



Table of Species of Chryotus. 



North America, including West Indies. 



I Femora chiefly black or brown 2 



, J Femora yellow, tips of hind ones sometimes inf uscated 16 



' ] Hind femora black, middle ones yellow, front ones usually 



with a dark stripe above (U. S. and W. I.) barbatus Loew. 



( Cilia of tegulfe black or brown 3 



/ Cilia of tegular pale 10 



Third antennal joint in the male large, the tip drawn out in a 



slender point ( W. I.) acutus Aid. 



Third antennal joint in the male large, with a blunt tip, 

 upper basal angle rising prominently above the second 

 joint, lower edge straight, eyes of male contiguous obliquus~Loew. 



Third antennal joint in the male elongate, blunt, symmet- 

 rical cornutus Loew. 



Third joint not conspicuously elongate 4 



j ( Eyes of male not approximated on the face vividus Loew. 



' \ Eyes of male approximated or contiguous 5 



r ( Palpi of male large, projecting, snow white (W. I.) albipalpus Aid. 



' { Palpi of male of ordinary structure 6 



Femora metallic greenish black 7 



Femora brownish black 8 



Middle tibial wholly yellow obliquus Loew. 



Middle tibia? largely infuscated affinis Loew. 



g \ Third antennal joint of male small, plain ( W. I.) niger Aid. 



' I Third joint of male kidney-shaped, arista inserted in an apical notch 9 



Tibia- black or brown ( W. I.) excisus Aid. 



Tibia:* wholly yellow ( W. I.) proximus Aid. 



\ Eyes of male approximated choricus Wheeler. 



) Eyes of male not approximated 11 



\ Palpi white longimanus Loew. 



( Palpi blackish 12 





2. 



3. 



6. 



'■i 



9. 

 10. 

 11. 



