pepsinae: tribe macromerini 147 



9. Femora and tibiae entirely ferruginous; pubescence of head and thorax quite 



dense and fine 7. mollis, new species 



Femora and tibiae, or at least the middle and hind tibiae blackish; pubescence 

 of head and thorax a little less dense 10 



10. First tergite usually with long suberect hairs on its apical half as well as on 



its basal half; second segment of cubital vein about 0.95 as long as the 

 third segment (pi. 2, fig. 30) ; a slightly larger species with a little more long 

 suberect hair and a little denser and finer sculpture. Not always dis- 

 tinguishable from the following two species in the female, subspecies 



OF ARCHITECTUS 11 



First tergite without or with a very few long suberect hairs on its apical half; 

 second segment of cubital vein about 0.85 as long as the third segment (pi. 

 1, fig. 11); slightly smaller species with a little less long suberect hair and a 

 little sparser and coarser sculpture. Not always distinguishable from 

 architedus in the female 12 



11. Wings weakly infuscate; blue iridescence of head and thorax a little darker; 



suberect pubescence a little sparser; size averaging a little smaller; range: 

 Pacific States, British Columbia, Nevada, and parts of New Mexico. 



9a. architectus nietallicus (Banks) 

 Wings subhyaline or faintly infuscate; blue iridescence of head and thorax 

 a little lighter; suberect pubescence a little denser; size averaging a little 

 larger; range: Atlantic west to Colorado and Arizona. 



9b. architectus architectus (Say) 



12. Pubescence of head and thorax a little sparser and the individual hairs 



apparently a little less broadened basally so that the pubescence has a 

 little less of a silvery sheen; punctation of frons a little sparser and coarser; 

 maxillary palpus blackish, at least basally; all femora blackish. Not 

 always distinguishable from specimens of caerulescens with dark femora, 



10. nigrellus (Banks) 

 Pubescence of head and thorax a little denser and the individual hairs 

 apparently a little broader basally so that the pubescence has a slightly 

 more silvery sheen; punctation of frons a little denser and finer; maxillary 

 palpus usually light brown; some or all femora often fulvous. Not always 

 distinguishable from nigrellus in the female, even with specimens for com- 

 parison, except in the cases of specimens with fulvous femora, subspecies 

 OF caerulescens 13 



13. Front, middle, and hind femora blackish. 



8a. caerulescens subcorticalis (Walsh) 



Front and middle femora fulvous, the hind femur fulvous or partly or entirely 



blackish 14 



14. Face, frons, and some or all of clypeus blackish. 



8b. caerulescens caerulescens (Dahlbom) 

 Face, lower lateral corners of frons, and all of clypeus fulvous. 



8c. caerulescens floridanus (Banks) 



1. Auplopus Jlavicoxae (Banks) 



Pseudageida mexicana var. flavicoxae Banks, 1911, Proc. Ent. Soc. Wash., vol. 13, 

 p. 238; Journ. New York Ent. Soc, vol. 19, p. 233, [cf, ?]. Lectotype: c?, 

 Palmerlee, Ariz., June (Cambridge). 



Male: Fore^ving about 9 mm. long; clypeus truncate apically, its 

 apical margin thin and simple; mandible evenly curved; second 

 segment of flagellum about 4.7 as long as wide, the penultimate 

 segment about 3.4 as long as wide; groove of pronotum with more 



