288 Mr. Kenneth J. Morton on 



with a strongly marked virgule ; mandibles externally yellow ; genae 

 black; occiput yellow with yellowish hairs; labium yellowish. 

 Vertex black obscurely marked with yellowish, the black hardly 

 encroaching on the frons and continued very narrowly downwards 

 alongside the eyes. Occiput hardly swollen ; behind yellow divided 

 to the extent of about half by a blackish virgule. Behind the eyes 

 whitish with a broad black border. 



Prothorax black bordered with yellow in front and behind, with 

 two median yellow dots and a broken median line which becomes 

 confluent with the posterior yellow border. 



Thorax in front with long silky hairs ; black marked with yellow 

 thus : two large cuneiform antehumeral bands in front enclosing a 

 large black triangle, and two broad oblique lateral bands of almost 

 equal breadth; between these an interrupted line broken up into 

 four, the large upper part somewhat wedge-shaped, followed by a 

 minute elongate spot and a spot on each side of the stigma; no 

 humeral dot visible ; a yellow spot at the wing attachments above ; 

 a yellow inter-alar spot, double between the hindwings. Coxae 

 yellowish, sternum yellow with fuscescent markings. 



Abdomen cylindrical, constricted after 2nd segment, and gradually 

 increasing in breadth to 7th and 8th, the remaining segments again 

 narrower. Basal segment slightly brownish with traces of a yellow 

 spot at the extreme base. Abdomen otherwise black and yellow. 

 1st segment with yellow lateral markings both anterior and posterior 

 variable in extent; 2nd mostly yellow dorsally with a black basal 

 band followed by two fine black dashes, a black, sometimes isolated, 

 usually roughly oval dorsal spot; posterior margin finely black; 

 segments 3, 4, 5, 6 and 7 with large dorsal yellow markings partly 

 divided by the dorsal arete, on 3 occupying about | of the segment, 

 on 4 the spots occupying about | of segment ; on 5, 6 and 7 less than 

 ^, each of these five segments with posterior yellow lunules or bands. 

 Segments 8, 9 and 10 mostly yellow with large dorsal black patches. 

 Margins of segments ventrally finely lined with yellow along the 

 ventral suture. 



Appendages black. Superior about the length of last segment, 

 separated at the base. Outer margin in dorsal view nearly straight, 

 tip acute : inner margin about | from base forming a tooth from 

 which to the base the breadth is less ; in profile view broader at the 

 base where there is a large tooth with apex directed cephalad, and 

 the appendage tapers slightly to the acute apex which is somewhat 

 upturned. In profile view the median tooth is smaller than the other 

 with its apex pointed in the same direction. Inferior appendage 

 rather over half as long as the superior, broad with nearly parallel 

 sides, slightly emarginated at the upturned apex. 



