JOBLOTIA TRICHORRYES 183 



mandibles, with a small hair near the tip ; head-hairs all single. Lateral abdo- 

 minal hairs in threes on first segment, double on second to fifth, single on sixth 

 and seventh. No lateral comb on eighth segment, a small round plate bearing a 

 single stout seta, behind which is a small slender seta. Air-tube subcorneal, 

 about two and a half times as long as wide, smooth, a large, coarse, multiple tuft 

 posteriorly at basal third ; terminal hooks small. Anal segment twice as long as 

 wide, with a large dorsal plate ; dorsal tuft of two long hairs on each side ; lateral 

 hair single; subventral tuft of two long hairs arising from angle of a small 

 curved plate which extends across the ventral line to the tuft of the other side. 

 Anal gills longer than the segment, stout, with rounded tips, equal. 



The larvaB inhabit similar situations to those of the Johlotia digitatus. Mr. 

 Busck says : 



" Bred from bamboo near Tabernilla. While the larva and adult in a general 

 way look much like the two other species, the pupa of this species is easily dis- 

 tinguished from the somber, dark pupa of the others ; it is bright yellow, prettily 

 marked with black cross-bands on the back of the abdominal segments." 



Panama. 



Tabernilla, Canal Zone, larvae in bamboo- joints, May 9, 1907 (A. Busck). 



JOBLOTIA TRICHORRYES Dyar & Knab. 



Johlotia tricliorryes Dyar & Knab, Journ. N. Y. Ent. Soc, xv, 206, 1907. 

 Johlotia trichorryes Busck, Smiths. Misc. Colls., quart, iss., lii, 76, 1908. 

 Johlotia (?) trichorryes Theobald, Mon. Culic, v, 620, 1910. 



Obiginax, Description of Joblotia trichorryes: 



$. Form elongate-slender, the abdomen compressed; proboscis shorter than the 

 body, rather stout, and slightly enlarged towards the apex. Clypeus prominent, 

 luteous brown, with a row of fine hairs along each side, none in front nor on the 

 upper surface. Palpi short, rather slender, about one fourth the length of the 

 proboscis; tori yellow-brown; antennae with whorls of long hairs; occiput clothed 

 with flat iridescent blue and green scales, brilliant silvery in some lights; hind 

 margin with a row of erect dark scales; prothoracic lobes large and prominent, 

 well separated, clothed with brilliant silvery scales; mesothorax somewhat com- 

 pressed, clothed with dusky scales, pleura ochreous yellow, with patches of silvery 

 scales; scutellum clothed with broad flat metallic blue-green scales; metanotum 

 with three longitudinal impressions, a group of coarse terminal hairs; abdomen 

 obliquely truncate at the tip, clothed above with dusky scales, which show metallic- 

 green and steel-blue reflections; beneath silvery white, encroaching on the lateral 

 area as rounded segmentary incisions. Wings long and narrow, hyaline, the scales 

 of the veins dusky. Legs long, slender, without raised scales, black, with metallic 

 violet and blue reflections, the tarsi of the middle legs with the last four joints 

 brilliant white, the hind legs with the outer half of the third and the last two joints 

 white. Claws simple. Length, 5.5 mm. 



^. Proboscis shorter than in the female, more distinctly swollen at the tip; 

 palpi long, nearly as long as the proboscis, very slender; antennae rather sparsely 

 plumose; abdomen much compressed; claspers stout, rather small; no lateral fringe. 

 Length, 5.5 mm. 



Thirty-six specimens, Tabernilla, Canal Zone, Panama (August Busck, collector), 

 bred from larvae in bamboo joints. The larva resembles that of Johlotia digitatus 

 Rondani, but has the mandibles long and slender. In some of the adults there is a 

 little of black on the last joint of the middle legs. 



Type. No. 10847, U. S. National Museum. 



Description of Female, Male, and Laeva of Joblotia teichoebyes: 



Female. Proboscis rather long, slightly enlarged apically, the labellae coni- 

 cally tapered ; vestiture blue black, setae rather distinct, curved, black, those on 

 the labellae more prominently outstanding. Palpi short, one-fifth as long as 

 proboscis, stout, blue black, with a group of projecting setae below. Antennae 

 slender, with the joints subequal, the basal ones shorter, rugose, coarsely pilose, 

 black, second joint luteous at base ; tori subspherical, with a cup-shaped apical 

 excavation, luteous, dark brown within^ hairs of whorls long, rather dense. 

 Clypeus flat, broad, rounded, dark brown, with a slight fringe of coarse hairs on 



