KEHN AND HEBARD 79 



Orchelimum fraternum new ispt'fios (Figs. 16, 33, 65 and 66.) 



As shown in the key this is a species related to 0. unispina, 

 differing in the possession of a distinct though shallow humeral 

 sinus to the lateral lobes of the pronotum, in the relatively 

 greater width of the same lateral lobes, in the relatively broader 

 convex callosity of the lobes and in the relatively blunter and 

 less attenuate cerci of the male. 



Type. — cf ; Guadalajara, State of Jalisco, Mexico. (D. L. 

 Crawford.) [Acad, of Nat. Sci. Phila., Type no. 5269.] 



Description of Type. — Size medium; form moderately robust, subcompressed. 

 Head with the line of the occiput and fastigium on a plane with that of the 

 dorsum of the pronotum when seen from the side, the fastigial outline well 

 rounding into the subarcuate and but moderately retreating facial outline; 

 fastigium heavy, when viewed from the dorsum apprecialjly thicker than the 

 width of the proximal antennal joint, when seen from the facial aspect the 

 lateral margins of the fastigium are strongly arcuato-concave convergent 

 ventrad, rather narrowly in contact with the facial fastigium, the interfastigial 

 suture arcuate, the fastigium of the face narrow; eyes subcircular in basal 

 outline, this flattened cephalad, in depth the eyes are equal to about one and 

 one-half times that of the infra-ocular portion of the genae, when viewed from 

 the dorsum the eyes are but little prominent and somewhat flattened; antennae 

 at least twice as long as the body, proximal joint with a distinct rounded pro- 

 jection distad on the internal margin. Pronotum when seen from the side 

 with the dorsal line nearly straight, very faintly ascending caudad on the 

 metazona, greatest dorsal width (caudad) of pronotal disk contained about one 

 and two-fifths time in the dorsal length, on the prozona the disk rounds laterad 

 into the lateral lobes but is separated on the metazona l)y distmct though 

 rounded shoulders ; cephalic margin of pronotal disk faintly emarginate, caudal 

 margin of pronotal disk arcuate, slightly flattened mesad, prozona nearly twice 

 the length of the metazona, separated by a distinct but not very deep trans- 

 verse impression, faint indications of a medio-longitudinai sulcus present on 

 the prozona, this being continuous though slight on the metazona; lateral 

 lobes of the pronotum with their greatest dorsal length slightly surpassing the 

 greatest depth of the lobes, cephalic margin of lol^es moderately oblique, 

 truncate, passing into the sinuato-truncate ventral margin by a well roimded 

 obtuse angle, ventro-caudal angle narrowly rounded, rectangulate, caudal 

 margin oblique truncate, with a distinct and broad though shallow humeral 

 sinus, convex callosity distinct, elongate elliptical, with its greatest width con- 

 tained about three times in its length. Tegmina decidedly surpassing the 

 apex of the abdomen and falling short of the apices of the caudal femora by 

 about the same distance, elongate lanceolate, the margins regularly converging 

 in their distal two-thirds, apex acuminate with the extremity very narrowly 

 rounded; stridulating field relatively small, distinctly shorter than tlie pro- 

 notal disk and not quite as wide as the greatest width of the same, stridulating 

 vein nearly straight, slender, subecjual in width. Wings slightly surpassing 



TRANS. AM. ENT. SOC, XLI. 



