498 Mr. G. Meade- Waldo's revision of the speeies of 



141. (142) Totally black species; clypeus (q) clothed with dense 



silver pubescence; abdomen evenly punctured. 



corvus, sp. n. 



142. (141) Not black; abdomen almost wholly orange or ferru- 



ginous, abdomen impunctate. 



143. (144) Clypeus densely clothed with silvery pubescence ; clypeus 



bidentate at apex; wings fuscous. hairstowi, Crib. 



144. (143) Clypeus bare; wings pale, subhyaline or subfuscous. 



145. (146) Clypeus convex, punctured; mandibles falciform, very 



minutely serrate. . . . ferrugineus, Schulthess. 



146. (145) Clypeus liat, shining. im]ninctate, truncate at apex; 



mandibles distinctly 3-dentate. 



folUichjpcus, Schulthess. 



Subgenus Hoplomerus, West wood. 



1. (2) Wings unicolorous. 



2. (1) Wings bicolorous, the basal half golden hyaline, apical half 



fuscous. Abdomen black, sometimes with obscure 

 whitish marks on sides of apical margins of segments 3-6. 



spiniger, Schulthess. 

 Abdomen laterally with profuse pale yellow markings. 



var. muculatus, Schulthess. 



3. (4) Head and thorax with a considerable covering of long, 



griseous pubescence. Mcsonotum without any distinct 

 parapsidal grooves. Abdomen black, tergites 1-2 with 

 pale yellow apical fasciae. LcMigth 13 mm. q. 



siynplex, Bingham. 



4. (3) Head and thorax without conspicuous pubescence. Meso- 



notum with distinct parapsidal grooves. Abdomen 

 otherwise coloured. 



5. (6) Median segment hardly concave; clypeus, cephalic and 



thoracic markings yellow ; abdominal segments 1-2 

 mostly ferruginous adonis, sp. n. 



6. (6) Median segment distinctly concave ; clypeus, cephalic ajid 



thoracic markings ferruginous ; abdomen black, with 

 apical fasciae widening laterally, pale yellow. 



zebroides, sp. n. 



Subgenus Ancistrocerus Wesm. 

 Odynerus (Ancistrocerus) budongo, sp. n. 



$. Niger, densissime et brevissime aureo-tomentosus ; mandibu- 

 lis basi, clypeo (medio excepto), linea longitudinali inter antennas, 

 sinu orbitali, macula post oculos, maculis duabus pronoto, tegulis 



