A Classification of Lepidopterous Larvae. 



229 



again call attention to the fact that tubercle iv is large and well 

 developed in Porthetria dispar, the "gypsy moth;" but very small 

 in oar native species of Notolophus (= Orgyia).' 



Family Lasiocampidae. 



This family, which closes our first division (unless the alternative 

 view which I will suggest for the position of the Sphingidae be 

 adopted) has pursued a different line of development. The warts 

 have become reduced even to obliteration, and are largely replaced 

 by hairs arising from the skin. But these have made no great 

 advance in many species, owing to the fact that the larvie may be 

 protected by their resemblance to the bark of trees on which they 

 rest. 



I am struck by the fact that Mr. W. F. Kirby has placed the 

 Notodontian genus Apatelodes among the Lasiocanipidie.'-' Now 

 the larva of A. angeMca bears a most striking resemblance to many 

 Lasiocampid larvje, though probably a fallacious one. But, as this 

 larva is, without doubt, unknown to Mr. Kirby, I am at a loss to 

 understand his reference. Is there a closer relationship here than 

 appears at first sight? 



Clisiocampa pluvialis Dyar. 



This larva seems to exhibit, imperfectly it is true, the location of 

 all the tubercles. I have received some nicely 

 prepared examples from Prof. 0. B. Johnson- 

 Tubercle iv is shown just behind the spiracle in 

 Fig. 6; but there will be noticed two additional 

 ones on the anterior annulet. It is difficult to 

 make out anything positively owing to the ex- 

 treme reduction of the tubercles and the con- 

 siderable development of the bodv hairs. This 

 is the most generalized Lasiocampid which I fig. g.— a segment of 



have seen. CUsiocampa phnialls. 



Tolype velleda Stoll. 



There are two hairy warts, corresponding to ii and v, with 

 another lateral row on the thoracic segments. There is a dorsal 

 prominence on the 8th abdominal segment, which bears the two 

 tubercles i of each side. 



1 See my description in Proc. Boston Soc. Nat. History, vol. XXVI, p. 155. 



2 Cat. Lep. Het., vol. I, p. 851. 



