398 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 112 



5(4) Fifth tergum bearing a pair of strongly divergent long conical 



horns 6 



Fifth tergum without such horns 7 



6(5) Horns more vertical, width between tips of horns 5.0 mm . . mirabilis 



Horns more flattened, width between tips of horns 2.5 mm. 



brevicomis 

 7(5) Seventh tergum short, sixth entirely incorporated into the bulbosity, 



which thus appears almost terminal 8 



Seventh tergum long, sixth not wholly incorporated into bulbosity, 



which is distinctly subterminal 9 



8(7) Sixth tergum more than half as long as fifth, provided with a smaller 



elevation similar in shape to that of fifth filiventris 



Sixth tergum less than half as long as fifth, without elevations. 



atriclava 



9(7) Widest part of bulbosity in fourth segment; top of abdomen with two 



distinct longitudinal lines of gray hairs (fig. 24) .... globifera 



Widest part of bulbosity in fifth segment 10 



10(9) Fifth tergum lacking subangulate ridged elevations; sixth trisinuate 



posteriorly claviventris 



Fifth tergum with subangulate ridged elevations; sixth slightly convex 



posteriorly 11 



11(10) Elevations of fifth tergum distinctly inside lateral margins of disk 



(fig. 45) approximala 



Elevations of fifth tergum on lateral margins of disk, the margins 



passing over as carinae 12 



12(11) Elevations of fifth tergum pointed, nearer to posterior margin; clasper 



long and slender, slightly upcurved apically; abdomen not spotted. 



13 

 Elevations of fifth tergum more rounded or squared, at or close to 



middle; clasper of different shape 14 



13(12) Sixth segment more involved in bulbosity; seventh tergum apiculate 



and surpassing claspers recondita 



Sixth segment less involved in bulbosity; seventh tergum not apiculate 



and not surpassing claspers bulbifera 



14(12) Seventh tergum surpassing hypopygium by more than length of 



claspers; abdomen unspotted puncticauda 



Seventh tergum slightly or not surpassing apex of hypopygium, 



spotted 15 



15(14) Abdomen with 12 large pilose spots; four of these on sixth segment 



(figs. 16, 100) signata 



Abdomen with 10 or 14 pilose spots, none of these on sixth 



segment 16 



16(15) With a total of 14 spots on abdomen; fifth sternum with two more 



extensive spots near anterior margin and four smaller on apical 



margin (figs. 17, 102) grapta 



With a total of 10 spots on abdomen; fifth sternum with only two 



patches on posterior margin ignorata 



17(4) Seventh tergum without longitudinal carina, tip of tergum projecting 

 little if any beyond apex of hypopygium; apical hook of latter much 

 curved at base standing well clear of sternum so that it is usually 

 visible as a hook to the unaided eye uncinata 



