— 8 — 



The North American genera are Hypcrchiria, Heinileuca and 

 Pscudohazis. The exact position of Coloradia we have not been 

 able to establish for want of material. 



Family 5. — F!,ni)R()mii).i-'.. 

 After a somewhat careful examination of the European 

 Endromis versico/ora I find that it has the head, palpi, and antennae, 

 as well as the hairy abdomen, much as in Houilcuca tiiaia, but the 

 median vein of both wings divides into four branches, and the 

 sub-costal vein of the fore wings divides into five branches, as in 

 //. iiiaia and the other HemileucidK. The larva has a smooth, 

 sphinx like-body, with oblique bars and a caudal horn. The family 

 appears to form a branch of the Bombycine tree parallel to, but 

 distinct from the Hemileucid?e, and stands above the latter, con- 

 necting this group and the Ceratocampidre and Saturniidae with 

 the higher families of the Bombyces, in which there are four 

 branches of the median vein, all the families already mentioned, 

 with the Saturniidiv, agreeing with the Notodontida; in having but 



three branches. 



Family 6. — Bombycid/K. 



The type \s Bombvx niori \ it has three branches of the median 

 vein in each pair of wings. 



Family 7. — Plaiyptkrycid.*:. 

 In this group also the median vein of each pair of wings have 



but three branches. 



Family 8. — Psychid.-e. 



In this aberrant and highly modified group the number of 

 branches of the median vein varies from three [Ferop/iora] to four, 

 the true Psychidte. The group may be divided into two sub- 

 families : the Lacosomina^ and the Fsychitice. As the females of the 

 Lacosominse are winged, like the males, they are evidently in this 

 respect, as well as in the larval characters, less modified and more 

 generalized Bombyces than the genuine Psychidae, and they should 

 for this reason be referred to a distinct sub-family of the group. The 

 three last families form side-branches of the Bombycine phylum, 

 and before passing to the remaining families we shall have to 

 return again to the main trunk, to a point near where the Noto- 

 dontian branch originated, to consider the next group. 



Family 9. — Cochi.ioi'odid.k ( FimacodidK.) 

 We now come to families in which the median vein of both 

 wings throw off four branches or veinlets. From recent prolonged 



