48 TENTBLREDINID^. 



22. Ptilia soror. 



(Plate III. fig. 14.) 



Exp. al. 6 lin., long. corp. 3 lin. 



Yery similar to P. pwmilio, but twice the size. Wholly black, 

 except the middle of the thorax, which is rufous ; but the scapulae, 

 scutellum, and a large triangular spot in front of the thorax are 

 black. Wings smoky hyaline, with black nervures ; darker towards 

 the base of the fore wings. Third cubital nervure strongly angulated 

 outwards on its upper portion. 



Hab. Amazons. 

 a. 2 • (Type of species.) Amazons. H. W. Bates, Esq. 



23. Ptilia (?) melanalis. 



. Tenthredo melanalis, St.-Farg. Men. Tenthr. p. 115, n. 135 (1823). 

 Hylotoma analis, Fabr. Syst. Piez. p. 27, n. 27 (1804). 



Hab. South America. 



27. T0P0TMTA. 



Hylotoma, § 6, Klug, Jahrb. d. Insect, i. p. 248 (1834). 



Eore wings with three submarginal cells, the second receiving 

 both recurrent nervures ; one marginal, appendiculate cell ; tibiae 

 unarmed. 



1. Topotrita leucocephala 



301 



So 

 Hab. Cayenne. 



Hylotoma leucocephala, Klug, Jahrb. d. Insect, i. p. 248, n. 89 (1834) 

 Spin. Ann. Soc. Ent. Fr. ix. p. 132 (1840). 



28. HEMXDIANEURA. 



Ptilia, Norton {nee St.-Farg.), Trans. Amer. Ent. Soc. i. p. 61 



(1867). 

 Hylotoma, § 2, Klug, Jahrb. d. Insect, i. p. 240 (1834). 



Wings with one marginal (appendiculate) and four submarginal 

 cells; the first recurrent nervure received in the middle of the 

 second submarginal cell ; the second nervure received at or beyond 

 the junction of the second and third submarginal cells. Antennae 

 3-jointed, first two joints very short ; third joint bifurcate and ciliate 

 in the males, simple, setose, and sometimes curled in the females. 



1. Hemidianeura filiformis. 



Ptilia filiformis, Nort. Trans. Amer. Ent. Soc. i. p. 62 (1867). 



Hab. Mexico. 

 a. $ . Mexico, M. Sails'. 



