4 PROCEEDINGS OF THE NATIONAL MUSEUM vol.69 



F\ Second sternite with yellow only on anterior margin; 

 third sternite with a pair of yellow spots which 

 touch the anterior margin ; arcuate bands on ter- 

 gites 3 and 4 not interrupted or only slightly so. 



radiosum, new species. 

 F^ Second sternite with hind margin yellow ; yellow spots 

 on third sternite separated from anterior margin. 

 G\ Arcuate bands on tergites 3 and 4 not interrupted. 



integrum Williston. 



G^ Arcuate bands on tergites 3 and 4 interrupted. 



H\ Basal antennal joints combined as long as, or 



longer than the third ; a large yellow spot 



above fore coxa ; basal half of venter 



largely yellow pilose pubescens Loew, 



H^ Basal antennal joints combined shorter than 

 the third ; venter black pilose. 

 I\ Face nearly straight in profile ; antennal 



joints, 1:1: 2 plumeum Johnson. 



1". Face distinctly concave; antennal joints 



1 : 0.5 : 2 perplexum Johnson. 



B'. Palearctic species. (All here included are Asiatic except cautmn 

 and fasciolatum, European.) 

 C\ Apical corners of tergites not projecting. 



D^. Third antennal joint longer than first and second ones to- 

 gether ; dorsal abdominal bands extending over sides; 

 sternites 2, 3, and 4 with yellow markings on anterior 



margin ladakense, new species. 



D". Third joint as short as, or shorter than, basal ones. 

 E\ Cheeks, below eyes, entirely black. 



F'. Lateral abdominal margins entirely yellow and with 



small black bristles chinense, new species. 



F^ Lateral margins alternate black and yellow, and yel- 

 low pile intermixed with the black bristles. 



nigrifacies, new species. 



E^ Cheeks yellow cautura Harris 



0^ Apical corners of tergites moderately to strongly projecting. 

 D\ Pteropleura black pilose. 



E\ Arcuate abdominal bands extending upon sides. 



F'. Antenna shorter than fore tarsus tartar, new species. 



F^ Antenna longer than fore tarsus. 



fasciolatum (DeGeer), 

 E^ Arcuate abdominal bands separated from sides. 



mongol, new species. 

 D*. Pteropleura yellow pilose. 



E\ Third joint about as long as basal joints, apical corners 

 of tergites moderately projecting ; moderate sized spe- 

 cies. 

 F\ Hind tarsi black; hind coxa with well-developed 



spinose tubercles tuberculatum, new species. 



F^ Hind tarsi yellow; hind coxa (male and female) only 

 with tuft of stiff black hairs-fratellum, new species. 



