HYMENOPTERA. 297 



50. EUCERA RUFESCENS. 



Eucera rufescens, St. Farg. Hym. ii. 130. 18c?. 

 Hab. Cayenne. 



51. EuCERA ALTERNANS. 



Eucera alternans, St. Farg. Hym. ii. 138. 30 ^ . 

 Hab. ? 



52. EuCERA CINEREA. 



Eucera cinerea, St. Farg. Hym. ii. 125. lie?. 

 Hab. ? 



53. Eucera marginata. 



Eucera marginata, St. Farg. Hym. ii. 135. 26 <? . 

 Hab. ? 



54. Eucera pulvinata. 



Eucera pulvinata, St. Farg. Hym. ii. 140. 32 $ . 

 Hab. ? 



55. Eucera squamosa. 



Eucera squamosa, St. Farg. Hym. ii. 134. 24 $ . 

 Hab. ? 



56. Eucera. vetula. 



Eucera vetula, St. Farg. Hym. ii. 127. 13 <? . 

 Hab. ? 



Genus 44. TETRALONIA. 



Apis, pt., Rossi, Faun. Etrus. 923 (1790). 



Eucera, pt., Fabr. Ent. Syst. ii. 343 (1793). 



Macrocera, Latr. Fam. Nat. (nee Meig. Illig. Mag. 1803, Dipt.) 



(1825). 

 Tetralonia, Spin. Ann. Soc. Ent. Fr. vii. (1838). 



The maxillary palpi 6-jointed, the labial palpi 4-jointed; the 

 superior wings having one marginal, and three complete sub- 

 marginal cells ; the first recm-rent nervure received at or very 

 near the apex of the second submarginal cell, occasionally uniting 

 with the second transverse cubital nervure, the second recurrent 

 nervure received at the apex of the third submarginal cell. The 

 antennae of the males elongate. 



p2 



