704 



MR. R. E. TURNER ON 



14. Wings subhyaline ; head, pronotum, mesonotum, and 



scutellumred; vertex punctured E. Iieteroffamia Sauss, 



Wings fusco- violaceous 15. 



15. Vertex punctured ; pronotum closely punctured; legs 



black jE. Jiova Tm-n. 



Vertex smooth; pronotum sparsely punctured ; legs 



red 16. 



16. Head red, thorax black I], ruficeps ruficeps Sm. 



Tnorax more or less red E. riificeps atopogamia 



[Sauss. 

 Males. 



1. Apical dorsal segment not incised at the apex 2. 



Apicil dorsal segment more or less incised at the 



apex 4, 



2. Third dorsal segment of the abdomen measured 



from the transverse basal furrow distinctly shorter 

 than its basal width. Abdomen wholly without 



yellow markings JE. incertalnm. 



Tliird dorsal segment measured from the transverse 

 basal furrow distinctly longer than its basal 

 width. Abdomen with very small yellow 

 markings 3. 



3. Apical dorsal segment flattened, with raised margins 



and a median carina ; pi-onotum entirely black ... JS. asmarensis Turn. 

 Apical dorsal segment convex, the margins not raised, 

 witliout a distinct median carina ; pronotum with 

 a yellow band on the posterior margin JS. anietalla Turn. 



4. Abdomen entirely black, sometimes with blue sheen . 5. 

 Abdomen banded with yellow 6. 



5. Wings more or less shaded with fuscous or viola- 



ceous ; incision of the apical segment half as deep 



^ as its apical width. Length 15-18 mm E. ■)~uficeps Sm. 



Wings clear hyaline ; incision of apical segment 

 much less than half as deep as its apical width. 

 Length 13 mm E. nodosa Guer. 



6. Apical dorsal segment flattened with rai.sed margins ; 



head large, the cheeks more than half as broad as 



the eyes E. oapitata Sm. 



Apical dorsal segment convex, with a median carina ; 

 head small, the cheeks much less than half as 

 broad as the ej^es 7. 



7. Not very slender ; the apical dorsal segment with an 



incision nearly as deep as broad at the apex E. spoliata Turn. 



Very slender ; incision of the apical dorsal segment 



not mOre than half as deep as its apical breadth ... E. longiventris Tm-n. 



Ems (Mesa) ALXciiB, sp. n. (PI. LXXXI. fig. 12 ; PI. LXXXII. 

 fig. 8 ; PI. LXXXIII. fig. 9.) 



$ . Nigra ; segmentis abdominal ibus qtointo sextoque rufo- 

 ferrugineis ; pedibus albo-pilosus, calcariis albidis ; alis nigro- 

 coiruleis. 



Long. 18 m7)i. 



2 . Head and thorax coarsely punctured-rugose, the punctures 

 on the front finer than on the vertex ; clypeus very broadly 

 rounded at the apex, with two or three indistinct teeth on the 

 margin ; scape shining and sparsely punctured, clothed beneath 

 Vith long whitish hairs ; the nine apical joints of the flagellum 

 Opaque. Front thinly clothed with white haii«, the interantennal 

 prominence well developed and feebly bilobed. Inner margin of 

 the eyes slightly sinuate ; posterior ocelli about twice as far from 



