Vol. XXX] ENTOMOLOGICAL NEWS 249 



13 Third antennal joint notched where the arista is inserted; fore 

 tibiae with a row of rather long slender bristles above, 



johnsoni V. D. 



Third antennal joint not notched on upper edge where the arista 

 is inserted; fore tibiae with a row of small hair-like bristles 

 above or nearly bare te.ranus V. D. 



Asyndetus occidentalis sp. nov. 



$. Length 2.5-3 mm - Face moderately wide, a little longer than 

 wide, with thin white pollen, the ground color showing through. 

 Front a little wider than the face, shining green ; palpi and proboscis 

 black. Antennae black (Fig. i), not large, second joint extending 

 narrowly to near the center of the upper edge of third joint, at which 

 point the third joint is attached. Lateral and inferior orbital cilia 

 white, a few of the upper cilia black. 



Thorax and pleurae shining green with more or less blue reflections, 

 in the holotype the thorax is mostly blue. Abdomen green with black 

 incisures and coppery reflections; hypopygium small with small 

 bristles. 



Antennae of Asyndetus. Fig. i, A. occidentalis male ; fig. 2, A. occidentalis female ; 

 fig. 3, A. nigripes female; fig. 4, A. longipalpis male. 



Coxae and femora metallic green ; tibiae and tarsi black ; fore 

 femora with a row of black bristles below, which are not as long as 

 the width of the femora, outer side with rather long hairs ; fore tibiae 

 with a row of hair-like bristles above. Calypters and halteres whitish, 

 the former with white cilia. 



Wings grayish; last section of fourth vein bent near its apical 

 third but not interrupted, beyond this bend the vein is very thin, not 

 much more than a fold in the wing; cross-vein far before the tip of 

 the first vein. 



9 . Agrees with the male, except that the fore tibiae have three 

 small bristles and a row of short hairs above. The antennae are also 

 smaller than those of the male. 



Described from two males and twelve females taken at Los 

 Ratios, California, May 22, 1918. by K. P. Van Duzee. 



T\pc in the collection of the California Academy of 

 Sciences. 



