HYMENOPTERA. 85 



Genus 19. CALLOMELITTA, n. g. 

 F. Smith's MSS. (Details, Plate IV.) 



Head transverse, the ocelli placed in a slight curve on the vertex; 

 labium obtuse, the paraglossae very short and rounded; the 

 labial palpi four-jointed, the joints nearly of equal length, the 

 basal joint a little the longest ; the maxillary palpi six-jointed, 

 elongate, being three-fourths of the length of the maxillae, exclu- 

 sive of the terminal lobe ; the latter being short, somewhat heart- 

 shaped, its margin ciliated with long hairs. Mandibles short, 

 stout and tridentate; the superior wings having one marginal 

 and three submarginal cells, the first submarginal cell as long 

 as the two following, the marginal cell nearly as long as the three 

 submarginal cells united; the posterior legs furnished with a 

 flocculus and scopa and the abdomen with an anal fimbria. 



1. CALLOMELITTA PICTA, n. s. B.M. 



Female. Length 5 lines. Head dark blue, coarsely punc- 

 tured ; antennae black, the flagellum rufo-testaceous beneath. 

 Thorax black, the disk, scutellum and a large patch beneath the 

 wings red, the punctures distant ; at the base of the metathorax 

 is a large enclosed smooth space, which has some short striae at 

 the anterior margin; wings fusco-ferruginous, subhyaline, and 

 having a purple lustre, the pubescence on the legs silvery- white, 

 the spines at the apex of the tibiae white. Abdomen bright 

 shining blue, having a purple tinge, the anal fimbria black. 



Male very similar to the female, but differs in having the an- 

 tennae nearly as long as the head and thorax, in the absence of 

 the red spot beneath the wings, in having the scutellum black 

 and a broad black stripe down the middle of the disk of the tho- 

 rax ; abdomen elongate and black. 

 Hab. Van Diemen's Land. 



Genus 20. AGAPOSTEMON. 



(Details, Plate IV.) 



Head subtriangular ; antennae elongate in the males ; the la- 

 brum transverse and concave in the females, produced into an 

 elongated lobe, which is sublanceolate and closely fringed at the 

 sides with stout flat hairs ; the apical half of the lobe is produced 

 into an elevated carina, which passes off in an oblique direction 

 to the margin on each side ; the labrum of the males transverse, 

 very convex and divided by a shallow groove in the centre, pro- 

 duced in front into an angular lobe distantly ciliated on its an- 

 terior margin. Mentum elongate, in the females more than four 

 times the length of the labium ; in the males the labium is about 



