139 CATALOGUE OF 



front of tlie hind angle, the other very near the fore border. Scutellum 

 with a testaceous spot on each side of the fore border, and with a testaceous 

 apical spot. Abilomen beneath with a testaceous patch at ihe base, and 

 will) two large testaceous spots on each side. Length of the body 4^ lines. 



Perhaps a local variety of O. basalis. 



a. Cuenca, Province of Equador. From Mr. Eraser's collection. 



19. OpLOMOS BASALIS. 



Ni(;er, nilens ; caput testaceo bivillatiim ; f.cvlum villa ahhrrviata slri(jiilaii 

 (luas rajtitatas emilteiile macnlixqite qiialuor latenilibus testaceis ; 

 scutellum tnaculis duabui aulicis apiceqtie testaceis ; pectus testaceo 

 ncto-maculatuin ; visiter playa basali macuUsque quatuor lateralibus 

 testaceis ; femora posleriora basi testaceo slriyata ; alcB anticce corio 

 apice testaceo. 



Black, smooth, shining, miinitely punctured. Head with the lateral 

 lobes testnceous. Scutum with an abl)reviated testaceous stripe which 

 emits a cnpitate testaceous streak on each side in front; two testaceous 

 spots on e;ich side, one obliquely in front of the other which occupies the 

 hind angle. Scutellum with a testnceous spi>t on each side at the buse, 

 and witli a larger teslaceeus iipical spot. Pectus with four testaceous 

 spots on each side. Abdomen beneath a large testaceous patch at the 

 base, and with t«o testaceous spnts cm each side. Posterior femora with 

 a testaceo\is streak near tiie base. Coiium of the fore wings with a testa- 

 ceous apical spot. Length of tlie body 4i lines. 



It may be connected with O. tripiistulalus hy inteimediate local forms. 

 In the latter, the hind angles of the thorax are wholly black. 



a. Ega. From Mr. Bates' collection. 



Africa. 



20. Ol'LOJIUS LIXEATUS. 



Niger, sitbtus cj/imen-nigpr ; capitis lohi lalerales lubum iiilermpdium su- 

 perantes ; thoracis latera antica luteo marginuta ; abdomen maculis 

 lateralibus rittnlaqne vcvtrali luteis ; pedes breves, robusti ; alee 

 anticce membrana niijra. 



Black, oval, slightly shining, rather largely punctured, blui^h black 

 and more shining beneath. Head more than one-third of the breadth of 

 the thorax ; lateral lobes longer than the middle lobe. Antennae setulose ; 

 second joint longer than the fourth and much longer than the third. 

 Thorax with a luteous line on each side in front. Abdomen with luteous 

 marginal dots; under side with a short luteous stripe, which emits two 

 branches. Legs short, stout, minutely setulose. Fore wings with a black 

 membrane. Length ol liie body 4i lines. 



It differs much in aspect from the American species of the genus. 



a. Abyssinia. Presented by the Secretary for Indian Affairs. 



Country unknown. 



21. Ori.OMUS VENTUALIS, C. H. 86. 

 a. ? From I\Ir. Children's collection. 



