igoy] Records of the Indian Museum. 213 



half often being quite clear, whereas in aenescens it is uniformly 

 pale brown and never clear at the base. The second distinguish- 

 ing character is the antennae, which are (exclusive of the reddish 

 1st joint) always black, or very nearly so, in this species, but 

 much lighter, and brown, in aenescens. In plumbellus the posterior 

 femora are often reddish on the apical half (in which case the base 

 is generall}^ paler yellow than the other legs), whereas in aenescens 

 they are always uniformly brownish yellow, and the tips never black, 

 as is often the case in this species. 



S. aenescens Wied., 1830. 



Ausser. Zweifl., ii, 579. 



Although the author says wing with a brownish tip, enclos- 

 ing the cross vein, I feel sure that I have correctly identified this 

 species, and think Wiedemann's specimen must have been an 

 abnormal one. In one or two specimens out of the series of sixteen 

 in the Indian Museum collection, there is a slight darkening towards 

 the tip, which is absent in most specimens. His description of 

 the shining lead front, and the femora being distinctly mentioned 

 as not red, and the extreme tip of the posterior femora not being 

 black, lead me to suppose the Museum specimens are this species, 

 Wiedemann's line as to the posterior femora being more or less 

 brown towards the tip, applies to an occasional specimen, but 

 the specific character is unifo-mly brownish yellow femora, quite 

 different from the distinct reddish tinge on the apical half of many 

 specimens of plumbellus. The Indian Museum series is from Ban- 

 galore, but I have two examples taken by myself at Shanghai on 

 April i6th and May 6th, 1906. Wiedemann originally described 

 both plumbellus and aenescens from China ; probably both species, 

 with ferruginosus Wied. and my new species sanguinipes are all 

 distributed throughout the East generally. 



S. costalis Wlk., 1859. 



Proc. Linn. Soc. Lond., iii, no. 



Walker has described two species separately under this name, 

 but neither has been seen by me. The author described the 

 present species ( cf ) from the Am Islands. I have had to place 

 it and the next species in my analytical table according to the 

 somewhat short descriptions supplied. Thus I have assumed by 

 " abdomen and legs tawny " that the coxae are tawny also. That 

 they are good species I have no doubt, from the four spots on the 

 face and frons. Both species seem to possess this number, whereas 

 in ferruginosus Wied. and crishna Wlk., the only others bearing 

 spots on the face, there are only two, and in crishna the mark is 

 a small streak, not a "dot " as Walker terms it. In size, too, both 

 this and the following species exceed their allies by two to three 

 millimetres. 



