CHEYSOPILUS. 129 



Table of Species. 



1. Win^s distinctly or darkly mottled (some- 



what Trypeta-\\\Q), or uniformly dark 



brown 2. 



Wings never mottled or uniformly dark 

 brown ; somewhat yellowish or (humeralis 

 only ) pale brown 6. 



2. Wing* more or less mottled 3. 



Wings uniformly dark brown 5. 



3. The pale spot beyond but contiguous to the 



stiguid quite clear and sharply defined; 1st 

 and 2nd subrnarginal cells 'and all pos- 

 terior cells with a well-defined clearer 

 spot Hi tip of each, but the outlines not [p. 131. 



sharply demarcated marmoratus, Brun., 



The pale spot adjacent to the stigma very 

 indefinite, not sharply defined; no wing- 

 bordt-r spots distingui.-hable fr >m the rather 

 clearer middle parts ol most of the cells . . 4. 



4. Prongs of upper branch of 4th longitudinal 



vein issuing from discal cell well sepa- 

 rated ; grou .d-c<>lour of hind border of 

 wing of same shade as remainder of wing; 

 stigma brown, rather ill-defined; length, [p. 131. 



3 mm albopictus, Brun., 



Prongs of upper branch of 4th longitudinal 

 vein issuing from discal cell united or 

 nearly so ; hind part of wing nearly clear, 

 except for the infuscatious along the veins ; 



stigma nearly blcick, more shai'ply defined ; [p. 132. 



length, 4 mm ornatipennis, Brun., 



5. The long dark brown stigma uninter- [p. 133. 



rupted luctuosus, Brun., 



Stigma interrupted by an elongate yellow [p. 133. 



spot Jlavopunct(itus,Brnn.,* 



6. Wii.g with six bluish opalescent spots ; 2nd 



posterior cell much longer than 3rd opalescens, sp.n.,p. 134. 



Wing without traces of opalescent spots; 

 2i,d posterior cell subequal to 3rd, at least 

 in ad my species 7. 



7. Mainly black species, at least the thorax . . 8. 

 Mainly yellowish or brownish species, at 



least the thorax almost nlways so 18. 



8. Wings with a di-tinct suffusion in addition 



to stigma ; (wings pale brown in humeralis 



only) 9. 



Winers unmarked except for the stigma .... 13. [p. 135. 



9. Wings uniformly pale brown humeralis, Brun., 



Wing- never uniformly pale brown ; prac- 

 tically clear, w;th more or less distinct 



suffusions 10. 



10. Wing-tip clear, a distinct brownish suffu- 

 sion from stigma to beyond middle of [p. 13?. 



wing segmentatus, Brun., 



Wing-tip always distinctly infuscated .... 11. 



K 



