new (jenera and species of Acroceridce. 511 



gibbosis, dorsoqne vitrlnque linea tenui ciirvata inter alas 

 flavis ; pediinciilo abdominis fascia basali maculisque dua- 

 bus lateralibus apicalibus, margineque postico segmenti 

 2di flavis; pedibus fulvis, femoribiis in medio nigricantibus; 

 alis dimidio basali cum dimidio costas fuscis, reliquis 

 hyalinis. 



Long. Corp. lin. 5\ ; expans. alar. lin. 10. 



Habitat in Nova Hollandia. In Mus. Britann. 



Genus Megaltbus. 



Genus novum Philopotce proximum, protliorace sub- 

 quadrato, thoracis dorso magis gibboso; abdominis seg- 

 mentis constrictis. 



Caput subglobosum, postice truncatum, oculi maximi, 

 capitis partem superam et anticam fere tegentes, supra et 

 sub insertionem antennarum connexi. Ocelli 2 verticales. 

 Antennas minuta3, artlculis 2, secundo subpyriforrai, seta 

 gracillima terminato. Proboscis elongata. Prothorax 

 transverso-qnadratus, valde declivis, subliorizontalis. 

 Thoracis dorsum valde gibbosum, scutellum gibbosum. 

 Alas mediocres, cellula apicali elongata ; cellula trigona 

 postica hand completa; venis integrisad marginem posticuni 

 alse extensis. Pedes graciles. 



The names here employed for this genus and its four 

 species were found attached to the specimens in manu- 

 script when purchased, and have been retained, although, 

 I believe, they have never been published. The latter 

 species, by their remarkably gibbose thorax, approach the 

 genus St/stropus, Avhich, after all, may possibly be a most 

 aberrant form of Acrocerida. 



Megalt/hus pictus. (PL V. fig. 4 and details.) 



Picexis, thorace castaneo-fulvo, nigro albidoque varie- 

 gato, vitta media antica nigra albido-marginata ; alis hyalinis 

 nubila media alteraque curvata subapicali fuscis, proboscide 

 et pedibus luteo-albidis, femoribus in medio obscurioribus, 

 abdomine piceo margineque postico segmentorum (in 

 medio singuli in maculam trigonam dilatato) albido ; 

 abdomine oblongo-ovato, apicibus segmentorum parum 

 incisis, segmento 4t.o in medio emarginato. 



Long. Corp. lin. 3 ; expans. alar. lin. 6. 



Habitat in Chili. In Mus. Hopeiano Oxonire. 



Variat coloi'ibus plus minusve vividis, interdum valde 

 suffisis. 



