Dec, 1918] Nearctic Species of the Genus Laphria 149 



11. Process not paralleling forceps, either almost touching 

 apex of forceps or widely separate therefrom. 



r. Process almost toucliing apex of forceps, 

 distinctly longitudinally twisted; a 

 deeply emarginate lobe on inner side of 

 forceps at base of process (Fig. 16); 

 facial pile silvery to yellow; no golden 

 triangle on thorax; considerable golden 



pile on abdomen scorpio n. sp. 



rr. Apical process not longitudinally twisted, 

 well separated from body of forceps, the 

 latter therefore appearing distinctly 

 emarginate; species with narrow tri- 

 angle of golden pile on thorax and golden 

 pubescence, on abdomen, 

 s. Process and apex of forceps appearing like 

 an opposed index finger and thumb, 

 the enclosed emargination, deep and 

 narrowest distally; hypopygium more 



oblique (Fig. 17) index n. sp. 



ss. Emargination more shallow, widest dis- 

 tally, the apical process enlarged so 

 that it has become main body of 

 forceps; hypopygium straighter (Fig. 



18) ithypyga n. sp. 



k. Forceps without inner apical process. 



t. Forceps concave along inner margin, 



without strong lobe at about middle 



of its length. 



u. Forceps viewed from above, narrowed 



to apex. 



v. Forceps rather acute, only slightly 



hollowed out beneath at apex. 



(Fig. 19) sicula n. sp. 



vv. Forceps less acute slightly upturned 

 exteriorly at apex; much hol- 

 lowed out beneath, with a thin, 

 vertical plate along concave 

 inner margin near apex. (Fig. 



21).! canis Will. 



uu. Forceps more or less clavate at apex; 



well hollowed out beneath. 



w. Apex of forceps trapeziform 



(Fig. 22) . . . .winnemana n. sp. 



WW. Apex of forceps spoon-shaped 



(Fig. 20). . . .franciscana Bigot 



tt. Forceps essentially straight, with a 



large inwardly and downwardly 



projecting lobe at about middle of 



its length (Fig. 23); species with 



disk of thorax black except for two 



central golden spots, .saffrana Fabr. 



Key to the Nearctic Species of Laphria Based So Far As Practicable Upon 



Coloration. 



a. Disk of thoracic dorsum black except for a central pair of yellow spots; general 



color of pubescence old gold saffrana Fabr. 



aa. Coloration otherwise. 



b. Integument of abdomen with yellow to ferruginous areas, bearing dense 

 concolorous pubescence. 



