MORGAN HE BARD 73 



When compared with a female of /. bergrothi (Griffini),!''-'' fg_ 

 males of this species are found to differ in the narrower interocular 

 space (.5 instead of .7 millimeter in width) and pronotum with 

 disk largely sufTused, latero-caudal sulci not distinctively colored 

 and caudal marginal portion transparent. We feel satisfied that 

 when the male sex of bergrothi is found, further distinctive features 

 in the genitalia will be noted. 



Type. — cT ; Rio Trinidad, Panama. March 7,1912. (A. Busck.) 

 [United States National Museum.] 



Size medium large, form slender. Interocular space narrow (.3 millimeter), 

 about one-third as wide as that between antennal sockets, four-fifths as wide as 

 interocellar space. Ocelli large and distinct, flattened surfaces of ocellar areas 

 forming a moderately sharp angle with interocellar area. Maxillary palpi moder- 

 ately short; fifth (distal) joint very slightly longer than third. Latero-caudal sulci 

 of pronotal disk pronounced. Tegmina and wings extending beyond apex of abdo- 

 men nearly twice the cereal length. Tegmina elongate and narrow, with portion 

 of dextral tegmen, concealed when at rest, transparent though slightly suffused. 

 Dorsal surface of abdomen specialized as is characteristic of the genus. '"^ 



Supra-anal plate trapeziform produced, with latero-caudal angles rounded and 

 margin between transverse; feebly and irregularly subchitinous in a small median 

 area, just dextrad of which the ventral surface of the plate is produced ventrad in a 

 thick heavy plate with apex rounded. 



Paired plate beneath supra-anal plate specialized on each side, the dorsal chiti- 

 nous arms, of which the dextral is much the longer, each armed with a distal spine; 

 beneath the sinistral of these is a heavy lobiform plate which is heavily spined dor- 

 sad, while dextrad is a large chitinous lobe covered with elongate hairs. Titillator 

 very similar to that of /. riifa occidentalis Saussure (plate IV, fig. 9). 



Subgenital plate hairy, strongly asymmetrical, surface convex except in produced 

 portion, where it is moderately concave; dextral portion of free margin strongly 

 convex to brief median portion of plate, which is weakly triangularly produced ; the 

 dextral style at the apex, about twice as long as basal width. tai)ering slightly to its 

 rounded apex, which is covered dorsad with minute teeth, this style directed sinistro- 

 caudad, so that its dextral margin is an almost even continuation of the dextral 

 margin of the produced portion of the plate; sinistral margin feebly convex, then 

 feebly concave to median produced portion, at the base of which is situated the 

 very small sinistral style, suboval, straight, supplied in distal half of sinistral face 

 with minute teeth, about three-quarters as long as dextral style and situated at a 

 distance from it of slightly less than its own length. 



103 \Ye have two Costa Rican females, apparently of that species, described from a 

 single female from Punta de Sal)ana, Darien, (Panama). 

 '"^ Described; Mem. .\m. Hnt. Soc, 2, p. 62, (1917). 



MEM. AM. ENT. SOC, 4. 



