365 



47. (Notoxus) porcatiis. Fab. Syst. Eleu. i. 287. Under the bark and 



on the blossoms of White Gum, in December and January. 



48. (OpilusJ congruiis. Umbrinus, elytrorum fascia comrauni fere 



recta, paullo pone medium sita, macula quoque utriusque api- 

 cali testaceis : femora basi la^te pallida : caput et prothorax 

 puncta, punctis parvis distinctis hand confluentibus : elytra 

 puncta, punctis magnis profundis, subseriatim dispositis, ante 

 apicem indistinctis, fere obsoletis : tarsis quasi 4-articulatis. 

 (Corp. long. '45 unc. lat. *11 unc.) 

 On blossoms of Eucalyptus. Extremely similar to Opilus mollis. 



49. Hydnocera ? conferta. Antennae parvae, basi testaceae, apice fus- 



cescentes : caput et prothorax nigro-purpurea, puncta, punctis 

 vix determinatis fere asperis : elytra nigro-aenea, nitentia, nee 

 maculata nee fasciata, puncta, punctis confertis, confluentibus, 

 nee magnis nee profundis : pedes rufo-testacei, femoribus apice 

 tarsisque fuscescentibus. (Corp. long. "3 unc. lat. '07 unc.) 

 On blossoms of Eucalyptus. 



Natural Order. — Pseudomorphites, Newman. 



The insects forming this natural order are remarkable for possessing 

 many of the structural characters and the economy of the Carabites, 

 while the lateral margins of the head, prothorax and elytra, form an 

 almost uninterrupted and continuous outline, thus giving the body 

 that figure and appearance possessed by the Dytiscites and Gyrinites, 

 so peculiarly adapted to the aquatic economy of those orders. From 

 the very valuable observations of Mr. Haliday (Entomol. 305) on 

 Adelotopus Dytiscides,* it appears that these insects naturally form a 



* Adelotopus Dytiscides. Ater, laevis, elytra obsolete striata, minutissime puncta. 

 (Corp. long. -375 unc. lat. "2 unc.) 

 Several specimens were found by Mr. Davis under bark of Eucalyptus, at Adelaide. 

 The head is immersed in the prothorax, the outline of the two being all but continu- 

 ous : the prothorax is very convex transversely, its lateral margins dilated and re- 

 curved : the elytra are very convex transversely, the lateral margins nearly parallel, 

 dilated and recurved ; the basal margin is also dilated, attenuated, and folded back 

 on the elytron, to which it is closely soldered ; it partially covers the lateral margin of 

 the scutellum, which is of moderate size and triangular, and the suture between the 

 scutellum and this folded portion of the elytron is so nicely fitted as to be observable 

 only under a lens of high power : the folded portion of each elytron, together with 

 the scutellum, unite in forming a most anomalous band across the insect, between the 

 prothorax and normal part of the elytra. For a long time I supposed this insect iden- 

 tical with the Adelotopus gyrinoides of Hope, but now believe it to be distinct. 



