1865.] 443 



nate on the anterior middle; basal segment much swollen towards the 

 tip, which is convex and somewhat gibbous, the apex rising rather 

 abruptly from the base of the second segment, with a yellow spot on 

 each side, sometimes connected by a yellow line on the apical margin ; 

 disk of the apical segment flattened and faintly concave, deeply notched 

 at tip to receive the long recurved black spine which arms the last 

 ventral segment; in one specimen there is a round yellow spot on the 

 basal middle of the last dorsal segment, in the other specimen this seg- 

 ment is immaculate; beneath, segments 2 — 6 have each a lateral apical 

 yellow spot. Length 6 lines; expanse of wings 10 lines. 



Two specimens. Allied to M. sexcincta, but differs by the smaller 

 size, the hyaline wings, and the longer, more convex and gibbous basal 

 segment of the abdomen ; the markings of the two species are much 

 alike. In one specimen the metathorax has a small central yellow dot, 

 as well as a small spot on each side at the extreme base. 



3. Myzine confiuens, n. sp. 



Black, spotted and banded with yellow; wings pale yellowish-hyaline; four 

 posterior tibiae ferruginous, covered exteriorly with numerous small subap- 

 pressed teeth ; tarsi setose ; ajjical segment of abdomen finely striated, black 

 margined posteriorly with rufous. 



Female. — Head black, with sparse deep punctures and thin pale 

 glittering pubescence; the orbits — narrow behind and continued in a 

 narrow line above on the occiput, on the disk of which they are nearly 

 confluent, broad and sinuate in front but not confluent with the line 

 on the outer orbit, — a large central spot just above the base of the an- 

 tennae, confluent with the broad inner orbits, and continued upwards 

 for a short distance on the middle of the front, yellow; the yellow 

 markings of the head are so arranged, that the front has two large 

 black spots which become confluent behind, the confluence covering 

 the ocelli; clypeus and labrum testaceous, pubescent; mandibles long, 

 slender, subacute, yellowish-testaceous, black at tips and fringed with 

 long yellowish hairs ; antennae short, stout, the scape rufo-piceous, 

 paler at tips, the flagellum opaque blackish, tinged with obscure rufo- 

 testaceous beneath. Thorax black, clothed with a thin, short, pale 

 glittering pubescence ; prothorax rather closely punctured, margined 

 before and behind with yellow, the yellow margin behind narrow and 

 even, that in front dilated on the sides, narrow on the middle, with 

 two emarginations in front, and another on the extreme sides behind ; 

 mesothorax almost smooth on the disk which lias a rather large sub- 

 quadrate yellow mark, on each side of which the surface is roughly 

 punctured, a small yellow spot on each extreme s de, just behind the 



