313 



3. 



4. 



5. 

 6. 



9. 



10. 

 11. 



12. 



Mesonotum shining, with only slight pruinescencc ; mid and hnid 



tibiae with lanceolate scales ■ V 'i^' ^'"f '^■^• 



Mesonotum opaque, densely pruinescent ; all tibia3 with lanceolate 



seales 2. squannpes. 



Mesonotum glossv black, without distinct pruinescence ; the diseal 



hairs black . . .^ 3. speculans. 



Mesonotum brown or black, shining, and with distinct pruinescence ; 



the diseal hairs in large part brassy yellow » 



Wings with a distinct patch of pale hairs at apex of third vein 



4. inlosa. 



Wings without a patch of pale hairs at apex of third vein 6 



Almost entirely yellow species, only the dorsal surface of abdomen 



with distinctly black markings -S- aurea 



Black species, pleura?, abdomen, and legs with yellow markings. . .7 

 Lartre species, 2.5 mm. ; abdomen with distinct yellow postmargmal 



baud to segments ^ pcrgandei. 



Smaller species, 1.75 mm. ; abdomen with l)ut slight indications ot 



yellow postmarginal band to segments, .pergandei, var. concolor. 



Glossy black species; mesonotum without pruinescence and with 



black hairs 3. speculans. 



Opaque or shining species; mesonotum with distinct pruinescence 



and a large portion of the diseal hairs brassy or golden 9 



Abdomen with the apex of the segments yellow _. . y:.. 



Abdomen without vellow apex to segments; basal joint of hind 

 tarsus longer than second (40 : 30) ; antepenultimate segment of 

 antennae verv slightlv more than half as long as preceding segment 



(16 : 31) . ." '. 2. squannpes. 



Basal joint of hind tarsus not shorter than second 1. cihpes 



Basal joint of hind tarsus appreciably shorter than second 11 



Apical segment of antenna? much longer than preapical (20 : 13) . . 



6. pergandei. 



Apical segment of antenna? slightly longer than preapical 12 



Dorsum of abdomen with narrow yellow hind marginal bands to 



segments ■■•• ■'^- P'^^'"- 



Dorsum of abdomen with broad yellow hind marginal bands to seg- 

 ments 5. aurea. 



CoMPARAxm: Lengths of Apical four Antennal Joints and two 

 Basal Joints of Hind Tarsi of Males.* 



Species 



F. cilipes .... 

 F. squamipes 

 F. speciilaris. 

 F. pilosa .... 



F. aurea 



F. pergandei. 



12th 



2.5 

 31 

 21 



31 



Antennal joints 



13th 



15 

 16 

 23 

 18 

 21 

 19 



*See foot-note to table on p. 305. 



14th 



11 

 11 

 15 

 18 

 19 

 13 



15th 



15 

 13 

 22 

 19 

 21 

 20 



Tarsal joints 



1st 



32 

 40 

 30 

 28 

 35 

 33 



2d 



31 

 30 

 30 

 35 

 45 

 38 



