238 Mr. Frederick Smith on 



Fam. SCOLIID^. 



Gen. DiMORPHOPTERA, n. g. 



The following are the characters of the females; (the 

 males are not known with certainty, though I believe the 

 specimen described as D. nigripennis to be a male) . The 

 maxillary palpi 6-jointed, the joints of about equal length 

 and thickness, except the apical joint which is more 

 slender; the labial palpi 4-jointed, the joints equal and 

 short. Mandibles stout, curved, and not toothed. An- 

 tennae filiform, short and stout ; the scape stout, equal in 

 length to the three basal joints of the flagellum united. 

 Thorax oblong, prothorax transverse, the metathorax 

 truncate ; the superior wings with one marginal, and three 

 sub-marginal cells ; the marginal extending half-way 

 towards the apex of the wing, from the apex of the cell 

 usually a short abbreviated uervure ; the first and second 

 cells of about equal length ; the second receiving a re- 

 current nervure in the middle, the third cell shorter, and 

 receiving the second recurrent nervure towards the base, 

 the apical nervure of the third submarginal is recurved, 

 and much rounded towards the apex of the wing, and 

 issues from the marginal cell towards, not from, its apex. 

 Legs and abdomen as in the genus Myzine. 



This genus may be considered merely a section of the 

 genus Myzine, from which it only differs in the arrange- 

 ment and neuration of the cells of the wings ; in Myzine, 

 the marginal cell receives the apical nervure of the third 

 submarginal at its extreme apex, which is not the case in 

 Dwio rp It op tera . 



To this genus belong Myzine signata, M. sahulosa, M. 

 anthracina, M. fuseipennis, and M. unicolor. 



1. Dimorplioptcra scoliiformis. 



Female. Length 1 inch. Black : the head shining, 

 the face rugose-punctate ; above, sparingly and finely 

 punctured ; the mandibles falcate, smooth, shining, and 

 fringed beneath with black hairs. The prothorax and 

 scutellum strongly punctured, the mesothorax with finer 

 scattered punctures, and with two longitudinal impressed 

 lines ; the metathorax opaque ; the prothorax, scutellum, 

 metathorax and also beneath, with erect black hairs ; the 



