The differences between G. blandina Pascoe, 1858 and G. laudata Pascoe, 1867 may be due to individual variations. When Pascoe published Longicornia, he had 1 female example of G. blandina from Sarawak and 2 of G. laudata from Sarawak, from which he surmised that G. laudata was a good species because it's elytral maculae were "larger", the shape of the pronotum was "more rounded" and there was no visible sutural vitta. The holotypes of both species and a good series of both species can be found in the British Museum. I have some poor quality photos, but it looks like specimens of both species have maculae with a variety of sizes and specimens of both species sometimes have the extremely short blue pubescence on the scape and dorsal side of the tarsi.