304 hymenoptera. 



30. Tachytes concinnus. B.M. 



Male. Length 4i lines. — Head and thorax black ; the face 

 covered with pale golden pubescence ; the mandibles yellow at 

 the base and rufo-piceous towards the apex ; the head and thorax 

 have a long thin cinereous pubescence ; the cheeks, prothorax, a 

 spot before and another behind the wings, clothed with bright 

 golden pubescence ; the legs have a pale golden pile, the tarsi 

 ferruginous, the calcaria and spines which arm the tibiae of the 

 same colour ; the wings hyaline, the nervures and tegulse pale 

 ferruginous. Abdomen : the first and second segments red, 

 the base of the former black ; the apical margins of the three 

 basal segments with bands of pale golden pubescence, the apical 

 segment covered with bright silvery pubescence. 



Hub. Brazil (Santarem). 



31. Tachytes undatus. B.M. 



Female. Length 3 lines. — Head and thorax black and closely 

 punctured, the face with a silvery pubescence; the sides of the 

 thorax and the legs have also a thin fine short silvery pubescence ; 

 the apical joints of the tarsi ferruginous ; the spines which arm 

 the tibiae and tarsi pale testaceous ; the wings hyaline and irides- 

 cent, the nervures black. Abdomen ferruginous, smooth and 

 shining. 



Hab. Brazil (Villa Nova). 



32. Tachytes Chilensis. 



Larra Chilensis, Spin. Gay's Chili, vi. 324. 2. 

 Hab. Chih. (Coll. F. Smith.) 



33. Tachytes? Gayi. 



Larra Gayi, Spin. Gay's Chili, vi. 324. 3. 

 Hab. Chih. 



34. Tachytes rufitarsis. 



Larra rufitarsis, Spiti. Gay's Chili, vi. 323. 1. 

 Hab. Chih. 



Sect. 2. Abdomen black. 



35. Tachytes apiformis. B.M. 



Female. Length 7 lines. — Black : the head and thorax clothed 

 with short pale ochraceous pubescence ; that on the face is dense 



