352 MEMOIRS OF THE CARNEGIE MUSEUM 



Tribe II. Ophelinini. 



The much shorter hind tibial spurs separate this tribe from the Eu2jlectrini. 

 The pronotum is also different, more rounded anteriorly, and the hind coxas are not 

 so much swollen. 



It is difficult sometimes to tell whether or not the abdomen is petiolate or ses- 

 sile, and in two or three cases I have been compelled to put certain genera in both 

 categories, the petiole being so short as to give the abdomen the appearance of being 

 sessile. 



TABLE OF GENERA. 



1. Females 2 



Males 14 



2. Abdomen- distinctly petiolate 3 



Abdomen sessile or subsessile 11 



3. Scutellum with tivo dorsal grooved lines 4 



Scutellum without dorsal grooved lines 9 



4. Body metallic 5 



Body not metallic 10 



5. Eyes bare, not pubescent - 8 



Eyes pubescent ; antennae 9-jointed , 6 



6. Abdomen ovate or oblong-oval, shorter than the thorax 7 



Abdomen conic-ovate, not shorter than the thorax, the second segment large ; funicle 4-jointed, the 



joints cylindrical, longer than thick ; metathorax produced into a subglobose neck. 

 Scutellum with a median grooved line ; mesothoracic furrows distinct. 



Diglyphomorpha Ashmead, g. uov. (type Diglyphvs maculipennis Ashm.). 

 Scutellum without a median grooved line ; mesothoracic furi'ows very delicate although complete, 



appearing incomplete without the aid of a strong Jeus A^dalus Howard 



(type A. aciculatus How.). 



7. Antennae 9-jointed, the funicle 4-jointed, subcompressed, joints 3-4 wider than long ; scutellum without 



grooved lines Leucodesmia Howard (type L. typica Howard). 



Antennae 10-jointed, the funicle joints longer than wide. 



Scutellum with 2 dorsal grooved lines Elachertomorpha Ashmead, g. nov. 



(type E. flaviceps Ashm.). 



8. Antennae 10-jointed, the funicle 4 jointed, the joints loosely joined ; abdomen globose, the petiole long, 



slender ; scutellum with two grooved lines Stenomesius Westwood. 



Antennae 10-jointed, with one ring-joint 10 * 



9. Antennae 9-jointed with two ring-joints 10 



Antennae 9-jointed, with one ring-joint ; the funicle 4-jointed, eyes pubescent ; funicle joints compressed, 



joints 3-4 wider than long ; abdomen oval or ovate, shorter than the thorax Leucodesmia Howard 



(type L. typica How.). 

 10. Antennae 9-jointed. 



Pi'onotum campanulate ; x^edicel long, obconic. Miotropis Thomson (type M. sidcicris Thomas.). 



Pronotum quadrate ; pedicel not long Dichotomus Forster (type D. acerinus Forst.). 



10*. Body of abdomen ovate as long or longer than the thorax, the petiole very short. 



Sympiesomorpha Ashmead, g. nov. (type 8. brasiliensis Ashm.). 



