94 Annals of the Carnegie Museum. 



cT {Older). Dorsal and posterior surfaces of head dark metallic- 

 green passing into blackish-brown on frons and nasus ; labrum, exter- 

 nal surfaces of mandibles, and genae below the level of the frons, pale 

 blue; extreme free margin of labrum, lower surface of mandibles, 

 labium, and borders of occipital foramen pale yellow. 



Prothorax obscure, reddish. Thoracic dorsum reddish-brown, sides 

 and pectus yellow, mesepisternal stripes as above, but dark metallic- 

 green, mesepimeral stripe broken into the two spots, dark metallic- 

 green ; pectoral markings blackish as above, except that the pair of met- 

 asternal spots are elongated and fused anteriorly and extend forward 

 as a blackish line into the mid-ventral groove. 



Dorsum of abdominal segments darker, retaining the metallic-bluish 

 reflection, except on the apical fifth or sixth, where it is replaced by 

 metallic-green. A narrow, transverse, basal, mid-dorsally interrupted, 

 pale ring on 3-7. 



Superior abdominal appendages longer than 10, not as long as 9,' 

 blackish-brown, curved toward each other in their distal halves. In 

 dorsal view the inner edge of each appendage bears at one-third the 

 appendage-length an acute tooth directed caudad, followed by a lam- 

 ina with an almost straight non-denticulated margin for about one- 

 fifth of the length of the appendage, this lamina terminating almost at 

 a right angle to the appendage and succeeded by a concavity, and this 

 by a small (sometimes double) tooth at seven-tenths of the appendage- 

 length, apex rounded. In profile view the proximal two-thirds are 

 almost straight, the distal third curved downward. 



Inferior appendages nine-tenths as long as the superiors, pale brown, 

 almost straight, curved slightly toward each other, very slightly en- 

 larged before the apex in dorsal view ; in profile view the distal three- 

 fifths much more slender than the proximal two-fifths. 



Legs pale blue or yellow, femora with a superior and an inferior 

 longitudinal black line, tibiie with an inferior longitudinal black line, 

 tarsi black. Pterostigma blackish brown. 



$ {Oldest seen). Generally blackish, except the blue and yellow 

 parts of the head as described for the preceding stage, the pectus 

 (which remains yellow, although the metasternal streaks near the 

 latero-ventral carinas are elongated anteriorly and unite with the black 

 line filling the mid-ventral groove), the dorsum of abdominal segments 

 2-5, which show a metallic-green reflection throughout, the ventral 

 margins of the tergites of 1-7 which are yellow, most of the inferior 



