Gomphine Drcujonfli.es from South America. 133 



Two males fro n Paraguay have been referred to G. den- 

 tatus by Dr. Calvert (Ann. Carnegie Mas. vi. p. 219, 1909), 

 but, in the absence of fuller particulars, it cannot be said 

 whether these specimens show any close affinity with G. dis- 

 tinguendus, as their habitat would seem to suggest. 



c? (holotype). "Buenos Aires, i. 91" (white label, by Kis), 

 " Aphylla dentata, Selys, <?, Buenos Ayres, Dr. Ris " (white 

 label, by De Selys), " Buenos Ayres, Dr. Ris" (green label, 

 by De Selys), "118" (pencilled on each of two yellow 

 labels). 



Length of abdomen 41 mm.; length of hind wing 33 mm. 



Labium, labrum, clypeus, frons, and occiput green or 

 greenish. Antenme and upper surface of head blackish 

 brown. 



Prothorax mostly green, with the anterior and posterior 

 borders yellow. Meso-metathorax greenish brown inid- 

 dorsally, laterally, and ventrally ; chestnut-brown at the 

 shoulders; the dorsum carrying a pair of antehumeral broad 

 green stripes, not quite reaching anteriorly the mesothoracic 

 half-collar, which, with the mid-dorsal carina, is also green; 

 another broad green stripe lies upon the mesepimeron, and a 

 narrow stripe of the same colour upon the metepimeron. 



Wings hyaline, with a mere trace of yellow at the base of 

 the hind wing. Venation blackish brown ; costa anteriorly 

 pale. Pterostigma 5 mm. long, golden yellow, with a distinct 

 brace-vein in all wings. At the margin of the wing two 

 cells between M 2 and Rs, three cells between M 3 and M^ in 

 the fore wings and two in the hind wings, and four to six 

 cells between Cu x and Cu 2 . Fore wings with 16-17 ante- 

 nodals and 10 postnodals ; hind wings with 12-14 antenodals 

 and 11-12 postnodals. 



Triangle in fore wing 3-celled. Subtriangle of fore wing 

 and triangle of hind witig 2-celled. Subtriangle of hind wing 

 free. One cross-vein in the supertriangle of each wing. 



Femora greenish brown ; tibise and tarsi black. 



Abdomen moderately inflated at segments 1-2 ; somewhat 

 constricted at 3 ; moderately inflated again at 7-10, fusiform ; 

 the inferior lateral margins of 8 and 9 not expanded laterally, 

 and but very little dorso-ventrally ; 10 in dorsal view 

 slightly constricted in the middle, the hind margin with a 

 shallow median rounded notch, the inferior lateral margins 

 produced apically. Segments 1-2, with the auricles, greenish 

 brown ; 3 mainly greenish brown, black distally; 4-6 black 

 mid-dorsally and distally, with an ill-detined brownish area 

 at each side proximally ; 7 light orange-brown in the proximal 



