MORGAN HEBAKI) 357 



proximacl strongly swollen and convex. Cerci short, stout, irregularly flat- 

 tened, curving inward and distad tapering to their bluntly rounded ajjices. 

 Ventral surface smooth. Fourth and fifth sternites distad with two, short, 

 parallel ridges; these weakly indicated on the preceding sternites. Sixth 

 sternite short, seventh large, projecting, with surface convex, mcdio-Iongi- 

 tudinally carinatc with apex produced like the verv narrow spout of a pitcher, 

 enlarged portion with a sharply rounded ])rojection on each side proxiniad. 

 Limbs wholly unspecialized. 



Allotype. — (juv.?) 9 ; Old Panamu, Panama. .January 31, 

 1911. (E. A. Schwarz.) [United States National Museum.] 



Agrees closely with male except as follows. Shorter (due to immaturity ?), 

 form much more robust. Granulation on mesonotum more decided and 

 thicker, similar on metanotum. Abdomen dorsad with seven fine, nearly 

 longitudinal carinae, the lateral margins with granules and the carinulae with 

 these particularly on sixth and seventh tergites; second tergite with caudal 

 extremities of four median carinae each elevated in a rounded tooth; sixth 

 tergite elevated mesad in a small bidenticulate process with apices rounded; 

 eighth and nine tergites tectate and showing two weak carinulae on each side, 

 eighth with latero-caudal angles very broadly rounded, ninth minutely but 

 deeply U-emarginate above the minute supra-anal plate, the acute projections 

 thus formed with apices rounded. Ventral surface with subobsolete granules 

 and carinae, a pair of the latter becoming distinct on the abdominal sternites. 

 Operculum flattened, strongly carinulate proximad on each side, distad with 

 lateral margins convergent and weakly convex to the deeply U-emarginate 

 meso-distal area, which leaves two slender, straight, finger-like apices. 

 Cephalic femora dilated dorsad with dorsal margin showing a munber of weak 

 but distinct undulations. Median femora with dorso-caudal margin bearing 

 two minute rounded-triangular lobes proximad, dorso-cephalic margin showing 

 traces of similar development as do the dorso-caudal margins of the caudal 

 femora. 



General coloration of male saccardos umber. Antennae, caudal limbs and 

 brief proximal portions of cephalic and median femora paler. Head with 

 ventral surface and a suffused postocular streak of darker coloration. Female 

 uniform clay color, showing a tawny tinge. Head with a suffused jjostocvilar 

 darker streak feebly indicated. 



Male, type. Length of body, oO; length of mesonotum, 7; median width of 

 mesonotum, L8; length of metanotum (including median segment), 11.2; 

 length of median segment, 1.4; length of cephalic femur, 18.6; length of 

 median femur, 13.8; length of caudal femur, 17.8; length of cephalic tibia, 

 20.7 mm. 



The female, allotype, though structurally ai)parently adult, is so much 

 smaller that it may represent one of the later stages of immaturity. Length 

 of body, 52.5; length of mesonotum, 14.3; median width of mesonotum, 3; 



TllANS. AM. ENT. SOC, XLVIII. 



