of the Amazon Valley. 315 



pressum. Caput exsertum, angustum, antice paulo pro- 

 longatum et attenuatum ; oculis paulo prominentibus ; 

 palpis brevibus, articulis terminalibus apice attenuatis 

 truncatis; antennis pilosis, apicem versus attenuatis, 

 articulis tenuibus, apice intus paulo productis. Thorax 

 tuberosus, antice valde angustatus et forte constrictus. 

 Elytra plana, abdomine quarta parte breviora, apicem 

 versus attenuata et dehiscentia, apice obtuse acuminata. 

 Pedes pilosi, postici longiores et robustiores; femora 

 omnia abrupte clavata; tarsi breves. Coxae anticaa 

 conicas, exsertse. Abdomen ( ? ) segmento ventrali primo 

 magno, integro, secundo paulo minori, postice semicircu- 

 lariter emarginato et longe ciliato, reliquis profunde 

 depressis. 



1. 8tenoptrellus culicinus, n. sp. 



Niger, nitidus; thorace tuberibus octo insequalibus, 

 duobus medianis linearibus ; elytris pallide ochreis, pas- 

 sim grosse punctatis, linea elevata laterali a medio usque 

 ad apicem ; abdomine segmentis duobus basalibus rufis. 



Long. 3i lin. ? . 



Hah. — Ega ; on flowers. 



Sub-fam. Necydalopsinj:. 

 Genus Sthelenus. 



Buquet, Ann. See. Ent. Fr. 1859, p. 621 ; Lacord. Gen. 

 viii. 494. 



1. Sthelenus hraconinus, n. sp. 



S. ichneumoneo (Buquet) affinis, differt thorace antice 

 nigro, pedibus anticis et intermediis totis rufis. Linearis, 

 testaceo-rufus, capite, antennis, plaga antica thoracis, 

 postpectore, femoribus posticis apice, tibiis tarsisque 

 nigris ; elytris pallidis, fascia paulo post medium fusca. 



Long. 5-7 lin. S ? • 



Hab. — St. Paulo, Amazons. 



Resembling to deception certain common species of 

 Bracon, Fam. Ichneumoniclce. Found flying at mid-day 

 on low bushes ; the limbs, as in Ozodes and the Clyti, are 

 extremely fragile, breaking ofl" almost at a touch. 



