288 HYMENOPTERA. 



il. Melecta Chiliensis. 



Female. Length 7 lines. — Black, a tuft on the faee, the tho- 

 rax above and the two basal segments of the abdomen, clothed 

 with white pubescence, that on the apical segments dark green. 



Hab. Chili. (Coll. F. Smith.) 



12. Melecta nigripennis. 



Melecta nigripennis, St. Farg. Hym. ii. 445. 5. 



Hah. ? 



1.3. Melecta testaceipes. 



Melecta testaceipes, St. Farg. Hym.. ii. 447. 8. 



Hab. ? 



14. Melecta septemnotata. 



Melecta septemnotata. Spin. Faun. Chili, vi. 186. 1. 



Male. Length 3 lines. — The antennas, body and legs black ; 

 the pubescence long and white on the head and thorax above ; 

 the wings hyaline, the nervures black. 



Hab. Chili. 



Genus 41. OSIRIS, n. g. 



(F. Smith's MSS.) 



Body elongate, naked, destitute of poUinigerous organs ; max- 

 illary palpi five-jointed, slender, the joints of about equal length, 

 the maxillae very long and slender, tapering to a point ; mentum 

 less than half the length of the labium, which is about half the 

 length of the body; the labial palpi four-jointed, the basal joint 

 very long, the second about twice the length of the two apical 

 joints ; labrum transverse, slightly emarginate anteriorly, the 

 mandibles bidentate. The superior wings having one marginal 

 and three submarginal cells, the first as long as the three latter, 

 the second submarginal cell nearly quathate, the third a little 

 wider and narrowed towards the marginal; the basal joint of the 

 posterior tarsi as long as the tibiae, the following joints short, 

 their united length less than that of the basal joint. Abdomen, 

 the sixth segment concealed, the ventral portion of the apical 

 segment produced, forming an elongate concave receptacle for 

 the basal portion of the sting; the sting apparently always 

 exserted, as long as the abdomen ; the male having apparently 

 only six segments in the abdomen, the seventh concealed. 



