Vol. Xxiv] ENTOMOLOGICAL NEWS 319 



Size ranging from 5.0-6.0 mm. The abdomen nearly black and con- 

 trasting with the metallic green of the thorax; legs rufous with the 

 bases of femora sometimes darkened ; frontal series of 4-6 bristles, 

 with or without one or two median pairs of proclinate bristles above 

 antennae. Wings with three brown bands which are generally as 

 broad as, or broader than, their alternating hyaline spaces, the basal 

 band dilating and attaining the inner margin more or less distinctly, 

 the apical band generally always connected with the middle band 

 along the costa and sometimes faintly along the inner margin. The 

 flattened sixth segment of female abdomen as broad as, and nearly 

 twice the length of, the fifth. 



The synonymy of Ortalis trifasciata Say seems certain, al- 

 though Osten Sacken in Psyche (2) accepts it only by read- 

 ing Say's description in a certain way. In this he errs in 

 thinking that Loew did not make his (Loew's) description 

 and figure agree. Loew's description mentions the connec- 

 tion of the two apical bands along the costa while his figure 

 shows only a clouding along the inner margin. Xo doubt 

 Lo^w had this and the next species before him. Of course, 

 there is some doubt as to whether this is \\'iedemann's species, 

 or, even Say's. 



Chaetopsis fulvifrons. 



1855, Macquart. Dipt. Exot., Suppl. v, 125, pi. vii, f. 8, (Urophora 

 fulfifrons). 



1831, Say. Desc. Ins. Louisiana. 19, (Trypeta trifasciata) (3). 



1867, V. d. Wulp, Tidj. V. Ent., x. 157, pi. v, f. 12-14, (Aciura aenea). 



Similar to, but smaller than, aenea (4-5 mm.), with the abdomen 

 more concolorous with the thorax; frontal bristles 2-4 without the 

 median pair. Wings similar but all cross bands less intense and more 

 evanescent towards inner margins, especially the basal band which is 

 seldom noticeable beyond the fifth vein. Sixth abdominal segment of 

 female much narrower and hardly longer than the fifth. The abdomen 

 of male seems to be more pointed on account of the lateral margins 

 being more revolute than those of aenea. 



As the basal band of the wing is very much abbreviated 

 in this species and sometimes the middle and apical bands 

 are not. or seldom, connected along the costa, the above 

 synonymy would seem to be correct. The name trifasciata 



(2) Psyche viii. 308. 1899. 



(3) See Psyche vii, 307, 1899, for this description republished. 



