— 99 — 



The name of an author in brackets following a description, 

 indicates that we have not seen the form described in nature ; but 

 have compiled the description from that of the author named. 



Preoccupied names are marked thus : — j| 



Class: Insecta; Order: Lepidoptera ; Suborder: Lepidoptera- 



Heterocera ; Super family : Bombyces. 



S_r//o/s/s of Fa mi lies. 



Secondaries with a frenulum. 



Vein I (internal) of primaries free, unbranched. 



Median vein of primaries 4-branclied, rarely only 2-or 3-branched from the 

 absence of some of the median venules. 

 Primaries with one internal vein. 

 Vein 8 of secondaries wanting (present in one genus) Euchromiidffi. 

 Vein 8 of secondaries arising from the subcostal at, or beyond one third 

 the length of cell from base (absent in 4 genera). 



Ocelli absent Lithosiidae. 



Ocelli present Arctiidse. 



Vein 8 of secondaries arising from, or near base of wing. 



Median vein of secondaries 3-branched Agaristldae. 



Median vein of secondaries 4-branched. 

 Secondaries with two internal veins. 



Thora.x slender, in width less than '/,; the length of fore 



wing Pericopidae. 



Thorax robust, more than '/r, of fore wing . . . Liparidse. 



Secondaries with one internal vein Drepanulidae. 



Primaries with two internal veins. 



Vein 8 of secondaries absent Pyromorphidae. 



Vein 8 present. 



Antennae of (^ pectinated for the basal two thirds, or 



simple Limacodidae. 



Antennce of (^ pectinated to the tip Lagoidse. 



Median vein of primaries 3-branched. 



\'ein 8 of secondaries straight ; veins 3 and 4 stalked . . Dioptidae. 

 Vein 8 of secondaries sinuate ; veins 3 and 4 not stalked. 



Wings entire or excavated below apex ; vein 8 of secondaries 



free Notodontidse. 



Robust ; forewings roundedly subfalcate ; vein 8 united to the 



subscostal by a cross-vein ........ Bombycidse. 



Vein I of primaries sinuate and branched Psychidae. 



Secondaries without frenulum. 



Secondaries unlike primaries and with less than 12 veins. 

 Primaries with one internal vein. 



Median vein 3-branched, vein 2 arising about middle of cell. 

 Antennae of (j"^ pectinated to the tip. 



Size medium ; antennte singly bipectinated ; secondaries with 



one internal vein LacoSOITlidae. 



