HARPALIN.E I7 1 



6 Anterior tibial spur slender and simple; thoracic angles broadly 

 rounded. Atlantic regions Xestonotus 



7 Ligula narrow, not at all expanded at tip; lateral line of elytral foveae 

 not interrupted; alternate elytral intervals not more coarsely punc- 

 tate. Atlantic regions Amphasia 



Ligula broader and very broadly, angularly expanded at apex; lateral 

 line of foveae uninterrupted; intervals 3-5-7 of the elytra with 

 coarser confused punctures. Atlantic regions Pseudamphasia 



8 Terminal spur of the anterior tibiae strongly trifid; body not dapti- 

 form 9 



Terminal spur gradually dilated basally and tumid or broadly angulate 

 at each side near the base 10 



9 Abdomen punctate throughout, elytral intervals all seriately punctate; 

 body hairy. Pacific coast fauna Dicheirus 



Abdomen impunctate, excepting the usual fine post-coxal punctulation; 

 integuments glabrous, the elytral intervals not punctate; body nearly 

 as in Anisodactylus, dark in color with brilliant metallic lustre above. 

 Palaearctic region *Hexatrichus 



10 Body nearly as in Daptus in habitus, the prothorax more or less 

 cardiform; coloration in part pale but always with dense integument; 

 elytra generally impunctate but sometimes with the alternate 

 intervals confusedly punctate. Atlantic to Pacific. . .Anadaptus 



ii Paraglossae broadly obtuse at apex, the ligula generally slender and 

 not or barely at all expanded at apex 12 



Paraglossae externally prolonged and slender at tip 15 



12 Abdomen glabrous and impunctate behind the basal region; anterior 

 tibiae spur simple and slender 13 



Abdomen and entire elytra densely and uniformly punctured and pubes- 

 cent; anterior tibial spur simple and slender 14 



13 Body daptiform, compact, with thick and shining integument, the 

 hind angles of the prothorax sharply defined; basal joint of the hind 

 tarsi short, not as long as the next two combined; ligula very slender 

 when compared with the paraglossae. Sonoran regions. 



Stilbolidus 



Body not daptiform, with thin integument as a rule, the hind thoracic 

 angles always blunt, at least at their tips; basal joint of the hind tarsi 

 long, equal to or exceeding the next two combined; ligula less 

 slender. Atlantic to Sonoran regions; apparently not entering the 



true Pacific coast faunal limits Anisotarsus 



14 Basal joint of the hind tarsi long, the tarsi very densely hairy above; 

 ligula very slender; prothorax not daptiform, the hind angles rounded. 



Palaearctic regions *Scybalicus 



15 Prothorax with rounded hind angles; tarsi very hairy above; an- 

 terior tibial spur extremely stout, truncate, strongly trifid; elytra 

 and abdomen densely punctate throughout as in Scybalicus; ligula 

 very broad, extremely expanded and laterally acute at tip. Palae- 

 arctic regions *Gynandromorphus 



Prothorax with sharply marked and generally right basal angles, the 



ligula not so broadly expanded 16 



16 -Paraglossae with the externally prolonged apices very slender and 



