254 Dr. T. A. Chapman's 



abdomen really is glabrous, till a closer search shows that 

 it carries a large number of fine brown hairs, less than half 

 the length of those on head and prothorax. 



The legs and incisions are of the same olive-brown 

 already noted. 



Length 10-14 mm. Width head 2-3 mm. 



„ prothorax 4'0 mm. 



„ mesothorax 3 8 mm. 



„ 5th abl. 50-6-0 mm. 



The coloitr of the larva varies a good deal. Takinsf it 

 as typically black above and pale luteous olive below, the 

 whole of the mouth region of the head belongs to the pale 

 lower region ; the demarcation between the two regions 

 being the lower margin of the subspiracular flange (middle 

 ridge of the triple marginal flange). In many specimens, 

 however, the anterior portion of the larva, especially the 

 prothorax, is dorsally paler, without being pale enough to 

 suggest the yellow colouring this segment has in some 

 other species. The marginal area may also be a little 

 more invaded by the ventral paleness. 



The blackness of the dorsum is also variable. In a 

 majority perhaps it is a brownish-olive, approaching black, 

 with a bronzy aspect in some lights, its paler tones being 

 due to lighter colouring (or comparative thinness of 

 pigment) in the bottoms of the minute sulci of the finely- 

 wrinkled surface. In some specimens the blackness is 

 dense and undoubted over the whole dorsum. 



The most remarkable fact as to the colouring observed 

 was as to two specimens, differing apparently in no way 

 from any of the others, that formed part of a number 

 turned out in the field : these two were placed on open 

 flowers of the Centcmrea when going out, and were still 

 there half-an-hour later when returning, but in the sun 

 were now of nearly as bright a metallic green as that of 

 the imago. I have been unable to induce others to exhibit 

 this colouring. 



According to its attitude the segmentation of the 

 larva looks rather different. The prothorax is of course 

 always very evident, and when the full-fed larva is 

 active and lively the mesothorax is a good long segment, 

 much like the others, but with the two ridges lower, 

 especially the anterior one. When at rest, however, and 

 especially if the larva be a little sulky and only lialf-grown, 



