348 BULLETIN 15, UNITED STATES NATIONAL MUSEUM. 



' Marginal v(uu at least twice as loug as the first abscissa of radius, the lat- 



ter straight, in a right angh^ with the costa or only slightly oblique. 



Zklotypa Forst. 

 Marginal tell open, 'or wanting. 

 Marginal cell wanting. 



Basal vein distinct; antennic filift>rni, pubescent, the first thigellar joint 

 twice as long as the pedicel, slightly eniargiuate at base. * 



Pantoi.yta FiJrst. 

 Marginal cell more or less distinctly present. 



Marginal cell much lengthened; marginal vein hardly longer than the 

 first abscissa of radius; anteuurs filiform pubescent, all the joints 

 lengthened, the first fiagcllar joint omarginate at base; anterior 

 tibial strongly bent, outwardly produced towards one side into a 



tooth or si>ine Zygota Forst. 



Marginal cell not much lengthened; first abscissa of radius very oblique; 

 anterior til)i;e simple; anteunic thick, filiform, densely ])ubescent, 

 the first flagellar joint not longer than the second, emarginate at base. 



AcLiSTA Forst. 

 4. Mesonotum with two furrows; marginal cell loug, open. 



Antenme stout, filiform, the first fiagellar joint longer than the second, the 

 second slightly emarginate at base, the joints after second scarcely 



twice as long as thick Psilomma Forst. 



Mesonotum without furrows. 



Antenuai filiform, the first llagellar joint shorter than the second. .IsMAUUS Hal. 



MACROHYNNIS Forster. 

 Hyra. Stud., ii, p. 131 (1856). 



A genus unknown to me, and the type, if still in existence, lias never 

 been described. Br. Forster in speaking of it says : 



In the genus Macrohi/nnis we have before us, on account of its peculiar venation, 

 a very striking form which can scarcely be confounded Avith any other. 



The marginal nervure, for instance, is fully twice as long as the rather short 

 marginal cell, and both combined present exactly the appearance of a plow-share of 

 simple construction ; while the baclcAvard directed branch of the radius, if continued 

 would cross the basal nervure. 



All joints in the female antennui are elongate, cylindrical, and so strongly length- 

 ened as to be readily confounded Avith those of the male were it not for the excision 

 of the first flagellar joint and the pointed abdomen, Avhich betray its sex. The 

 scape is short in both sexes; in the female at the most as long as the first joint of 

 the tlagellum, Avhile in the male it is usually somewhat shorter. The lateral angles 

 of the metanotum are slightly projecting. The abdominal petiole is longer than the 

 metauotum, although not abnormally long, and slightly furrowed above. The second 

 segment of the abdomen which vicnved laterally appears to be slightly compressed, 

 together with the remaining segments, liave a pear-shaped appearance partictilarly 

 pronounced in the case of the female, Avhile in the male the tip of the abdonu'u is 

 curved downward, giving the apex rather a more blunt appearance. The sutures 

 between the segments are A'ery line and the segments themselves are strongly 

 shortened, so that they are almost transversely linear. 



DIPHORA Forster. 

 Hyni. Stud., ii, p. 1?.0 (18,-)6). 

 (Type J). IVrsfwoodil Forster.) 



This genus is likewise unknown t<) me. Dr. Forster, oj). cit., p. 141, 

 mentions as the type, Diphora Wcnticoodii, bnt gives no description 



