474 R. OSTEN SACKEN 



peduncles is 20 mm. in the largest and 14 in the smallest of 

 the five specimens before me. The peduncles are dark brown , 

 the e^'es yellowish; the concave front between the peduncles is 

 also brown, but shows two rounded brownish-yellow spots, 

 which vary in size in different specimens ; some yellow marks 

 between these spots are less distinct, and, in most specimens, 

 invisible. The lower part of the head (below a line connecting 

 the peduncles and passing over the root of the antennae) is 

 yellow ; a brown stripe issues from the underside of the brown 

 peduncle , crosses the face , strikes the middle of the antennal 

 furrow, and, filling it out, reaches the oral margin very near 

 the end of the corresponding stripe on the opposite side. Thus, 

 the interval of the antennal furrows remains yellow ; it only 

 shows a brown spot in its upper part, near the root of the an- 

 tennae. All my specimens agree in this coloration of the face 

 and head, while that of A. longividens Walk. J. Pr. Lin. Soc. 

 Ill, 121 (Aru Islands) is exactly as M.'" Westwood figures it 

 in the Trans. Ent. Soc. Lond. N. S. V, Tab. 13, f. 4-5 (1861); 

 that is, the brown stripes, connecting the horns or peduncles 

 with the edge of the mouth do not fill out the antennal groo- 

 ves, the bottom of which is, for this reason, yellow, but remain 

 on the side of them ; in the loioer part of the yellow space 

 between the grooves , there is an elongated brown spot ; the 

 concave front is much more yellow than it A. longividens. 

 These differences seem to be constant ; they have decided me to 

 consider my specimens as specifically distinct ; to them may be 

 also added that .1. Albe r list has no brown cloud on the poste- 

 rior crossvein, and that its scutellum is less metallic green than 

 that of the other species. A closer comparison would probably 

 disclose other differences ; but at present , I have no specimens 

 of A. longividens before me. 



Antennae brown , arista yellowish at base ; palpi brownish 

 yellow. Thorax Ijrownish-black ; on the dorsum there are five 

 yellowish-sericeous stripes ; the two lateral ones and the middle 

 one are broader, the latter expanding triangularly in front of 

 the scutellum ; the two remaining , intermediate stripes , are 



