158 MR. K. E. AtrSTEK OJf NEW UIPXEEOUS IXSECXS. [Jail. IT, 



Baccha ferviua, sp. 11. (Plate V. fig. 11, J •) 



c? . Length 10 mm. 



General colour oratuje ; ahdoiaen deejj dull orange, with inelullic 

 hroivn jjosterior borders to the segments, flat, not contracted hasally, 

 hut expanding regularly to the end of the fourth segment : ivings 

 suffused ivith brown, slightly paler towards the tips; alulce of 

 full size. 



Face and cJiccks pale yellow, thinly clothed M'ith pale yellow 

 pile ; the face receding, \Aitli a very small tubercle. Front orange 

 pollinose, with a bro^^ n median stripe from the angle of the eyes 

 to the ujjpcn' margin of the ^ery slight anteuniferous projection ; 

 the latter pale orange in front, shiniug, \vith a black dot above 

 the antfnnic ; the front clothed with brown pile, ^infenna; orange, 

 short, third joint rounded at the tip, with the upper margin brown ; 

 arista bro\An, yellowish at the base ; vertical triangle bronze, black 

 at the apex, long, narrow ; ocelli remote from the vertex. Dorsum 

 of thorax metallic orange, somewhat iridescent, not pollinose, 

 with three narrow faint brown stripes (one median and one 

 on either side of it), which do not reach more than halfway : 

 Ijleurce metallic yellow; scm^ZZmih dull saffron-yellow. Abdomen; 

 first segment brownish orange ; second segment with a metallic 

 transverse band on the anterior as well as the posterior fourth ; 

 this segment is somewhat shining, especially in the median 

 line ; on the third segment the metallic brown transverse band 

 on the posterior fonrth expands somewhat towards the sides, and 

 there is a semi-obsolete faint brown median stripe, extending 

 from the anterior margin to the posterior border ; on the fonrth 

 segment the posterior band is only about half the width of 

 that on the third, lint it expands into a median triangle, which 

 is connected by a faint brown stripe \^ith the anterior margin, 

 and also into a quadi'ate area on each side, which occupies rather 

 more than half the length of the segment ; the median stripe is 

 somewhat clavate at its anterior extremity, and this is also the 

 case with the similar stripe on the third segment ; the fifth segment 

 is whollj' shiniug, and the brown portion is about equal to 

 the orange in area ; the posterior border is, however, much 

 narrower, while the median stripe is broader and more sharply 

 defined than on the previous segments, and that which corresponds 

 to the brown lateral quadrate areas on the fourth segment is here 

 represented by an ovate mark on each side, extending nearly to 

 the anterior margin and situated nearer the middle line, so that 

 the lateral margin of the segment as far as the posterior border is 

 orange ; the orange portion of the fifth segment on each side of 

 the median stripe is therefore deeply indented by a brown notch : 

 genitalia brown at the tip : with the exception of a tuft of pale 

 yellow hairs on each side of the first segment, the pile on the 

 abdomen is black, appressed, and very short and sparse, though it 

 is somewhat longer on the fifth segment. Legs yellow ; posterior 

 pair deeper orange, but without bands. Third longitudinal vein 



