86 HAUSTELLATA. — LEPIDOPTERA- 



the genus Satiirnia, Dr. Horsfiekl is inclined to place them, from 

 tlie consideration of their larvse : but as my limits will not permit 

 me to discuss the point here, I must refer to the introduction to my 

 Catalogue for my ideas respecting their location. The present 

 genus differs from Heterogenea at first sight by the stoutness of its 

 thorax and abdomen, the elongation and rotundity of its anterior 

 wings, and the robustness of its antennae; the proportions and 

 comparative bulk of the palpi, and other less evident characters. 



Sp. 1. Testudo. Alls fulvis, aut ferrugineis, strigis dvahus obliquis obscuriori- 

 bus. (Exp. alar. $ 8 — 11 lin. : ^ 10 lin. — 1 unc. 4 lin.) 



Hep. Testudo. Fabricius.—Fh. Testudo. Wilkes, pi. 88.— Li. Testudo. Steph. 

 Catal. No. 6044. 



Anterior wings deep fulvous^ clouded with dusky, with an oblique dusky stria, 

 reaching from near the base of the inner margin to about the middle of the 

 costa, and another extending from the costa, a little behind the middle, 

 nearly to the anal angle ; cilia dusky : posterior dusky-black, sometimes ful- 

 vescent on the inner margin ; cilia dusky-fulvous, deepest at the base. Fe- 

 male with the anterior wings deep unclouded tawny, and shghtly ferruginous, 

 with the cilia concolorous; posterior fulvous, thickly irrorated with dusky; 

 ciUa pale tawny : markings of the anterior wings as in the male. 



This insect varies much; in some cases the males have the anterior wings 

 clouded with large patches of fulvous, and others nearly immaculate : the 

 females have the posterior wings occasionally nearly fuscous: — both sexes 

 have frequently the rudiments of a second striga parallel with the usual 

 basal one. 



Caterpillar green, with two whitish dorsal lines: it feeds on the oak; and is to 

 be found at the beginning of September : the imago appears towards the end 

 of June. 



In certain seasons this insect is taken in tolerable plenty at 

 Darenth-wood ; and I have captured as many as a dozen males in 

 one day, while flying amongst the underwood, a little after noon ; 

 but, on the whole, the insect may be esteemed rare. It not 

 only occurs in that neighbourhood, but at Birch Wood, the woods 

 near Chisselhurst and Sydenham ; and it has likewise been taken 

 within this twelvemonth near Ipswich. 



Lkpidoptera Nocturna. 



By which term, as being the typical group, I shall include such insects only as 



possess the following characters : 

 Palpi two, most frequently compressed ; the second joint usually large ; the 



terminal short: maxilla: in general elongate, rarely abbreviated; never 



