ORTALID^E IDIOTYPA. 183 



Gen. VI. CHOLERA. nor. gen. 



Charact. Front very broad, very little narrowed anteriorly ; 'the excava^ 

 tion of its upper part very shallow ; the ocelli near the vertex and 

 closely approximated to each other. 



Antennal arista with a very short pubescence. 



No mesothoracic bristle, and, as it seems to me, no prothoracic one. 



Scutellum with four bristles; the lateral ones weak and small. 



feet: front femora rather strong, with conspicuously long and strong 

 spines ; the four posterior feet remarkably long and slender, their 

 femora with small spines near the tip only, otherwise these femora 

 are thin and very long, especially the intermediate ones. 



Wings: posterior angle of the anal cell obtuse; the small crossveiu a 

 little beyond the last third of the discal cell ; opposite this crossvein, 

 the second longitudinal vein emits a little stump of a vein into the 

 submarginal cell ; the last section of the fourth longitudinal vein 

 is nearly parallel to the third. 



The typical species is Michogaster egregius, from Columbia, 

 described by Gerstaecker (Stett. Ent. Z. XXI, p. 119). I possess 

 the male only. The ovipositor of the female is called sugar-loaf 

 shaped by the author; which would indicate that it is less com- 

 pressed than in the other RicJiardina ; it may be somewhat of 

 the same shape as in Stenomacra Guerini. 



Gen. VII. IDIOTYPA nov. gen. 



Charact. Front very broad, not narrowed anteriorly ; ocelli rather 

 approximated to the edge of the vertex, and placed close to each 

 other. 



Antennal arista with a short pubescence. 



No mesothoracic bristle ; a weak prothoracic one. 



Scutellum with two bristles ; metathorax sloping. 



Abdomen slender and elongated, almost pedunculate at the basis. 



All the/emora strong and armed with spines. 



Wings: posterior angle of the anal cell quite obtuse; the small cross- 

 vein beyond the last third of the discal cell ; opposite this crossvein 

 the second vein has a stump of a vein, inside of the submarginal cell, 

 and a second one on the opposite side, in the marginal cell, nearer 

 to the apex of the wing; the last section of the fourth longitudinal 

 vein almost parallel to the third. 



1. I. appendicillata n. sp. $ 9 . (Tab. IX, f. 26.) Ex ochraceo 

 ferruginea, thorace flavo-vario, alarum dimidio anteriore ex ochraceo 

 ferrugiueo, posteriore subhyalino, dilute lutescente. 



