30 PROCEEDINGS OF THE NATIONAL MUSEUM vol.78 



the foregoing key, though it is readily distinguished from any 

 included species by the color markings of the wings and body. 



DIASTATA (SPILOCHROA) PUNCTIPENNIS (Melander) 

 Spilochroa punctipennis Melander, Psche, vol. 20, p. 167 (1913). 



I have examined only the two examples in the United States 

 National Museum which belong to the type series. 

 Known only from New Mexico. 



DIASTATA (SPILOCHROA) ORNATA (Johnson) 



Eeterochroa ornata Johnson, Proc. Philadelphia Acad. Nat. Sci., 1895,. 

 p. 306. 



This is the commonest of the North American species, but it has 

 been recorded only from Florida and the West Indies. Before me 

 there are specimens from Texas which agree very well with those 

 from Florida, but the two which I have examined from Kingston, 

 Jamaica, differ from both in having the two larger hyaline marks 

 in the marginal cell of the wing connected posteriorly, and three 

 instead of two smaller hyaline marks directly below them in the sub- 

 marginal cell. There is also a rather evident brown mark in center 

 of the posterior margin of the mesonotum which is not, or but 

 slightly, visible in the Floridan specimens. It is not improbable that 

 this is a distinct species from ornata^ but more material is necessary 

 to enable dissection of the male hypopygium to insure a definite 

 decision. 



DIASTATA (SPILOCHROA) POLITA, new species 



Female. — Differs from ornata in having the mesonotum without 

 small brown marks, the scutellum with two faint brownish marks 

 at apex, the abdomen usually glossy black or very dark brown, 

 rarely with the bases of the tergites yellowish, and the wings with 

 less numerous hyaline markings. 



Structurally similar to ornata. 



Length, 3-3.5 mm. 



Type.— Csit. No. 43124, U.S.N.M., New Mexico, airplane (P. Glick). 

 Paratypes, Las Cruces, N. Mex. (Townsend), and Texas (Belfrage). 



The Texan specimen is the one with pale colored abdomen. 



DIASTATA (SPILOCHROA) ALBIBASIS. new species 



Male. — Head similar to that of ornata, the thorax with paler grey 

 dusting and a dark brown dot at base of each of the dorsocentral 

 bristles, the abdomen whitish grey dusted at base above, merging 

 into dark brown before middle, the apex almost black, the hypo- 

 pygium alone shining. Wings whitish hyaline, unspotted to level 

 of apex of first vein except for a mark over humeral cross vein, 

 markings on disk much as in ornata. Legs testaceous yellow. 

 Halteres yellow. 



