189I.] ENTOMOLOGICAL NEWS. 115 



Preparatory stages of Spilosoma lalipennis Stretch. 



By Harrison G. Dyar, New York City. 



Egg. — Not observed; the eggs had been entirely devoured by the little 

 larvae, but, judging from the marks left on the leaf, were about .6 mm. in 

 diameter. 



First stage. — Not observed, but judging from the cast skins very similar 

 to the second stage. The head was pale, the jaws brown, width some- 

 what over .3 mm. 



Secofid stage. — The larvae were found in this stage June 26th on an ash 

 leaf, some twenty or thirty together. Head pale whitish, brownish on the 

 clypeus and at vertex; ocelli black; width .4 mm. Body whitish, the 

 warts concolorous and hardly distinguishable, bearing long whitish hairs. 

 Length of larva 3 mm. 



Third stage.— Head shiny, pale yellowish, faintly brownish at the ver- 

 tex, ocelli black; jaws brown; width, .6 mm. Body as before, the warts 

 small, concolorous, and bearing long blackish hairs. 



Fourth stage. — Head as before, but not brownish at the vertex; width 

 .9 mm. Body pale whitish, semi-transparent, the food showing through 

 as a darker band. Hair rather long, whitish. Length 8 mm. 



Fifth stage.— Head pale straw color, ocelli black, mouth brownish; 

 Avidth I.I mm. Body as before, the hair whitish and rather abundant. 



Sixth stage. — As in the previous stage; width of head 1.3 mm. An 

 orange subdorsal spot on joint 12, and a much fainter one on joint 3. 



Seventh stage. — As before; width of head about 1.6 mm. (measurement 

 not very accurate) A blackish subdorsal shade band and row of seg- 

 mentary white dorsal spots faint at the extremities of the body. Hair 

 rather long, mixed with black. 



Eighth stage. — Head testaceous; jaws dark brown; ocelli black; width 

 2.1 mm. Body sordid greenish, mottled with black over the dorsum, a 

 white dorsal and super-stigmatal line and pale stigmatal shade; spiracles 

 white in a narrow black border; warts large, concolorous. Hair rather 

 bristly, of irregular length, tawny brown, mixed with blackish; on joint 

 12 an orange spot surrounding the wart of row three. Thoracic feet 

 testaceous. 



Ninth stage. — Head brownish testaceous, mouth pale, ocelli and jaws 

 black; width 2.3 mm. Body nearly black from the thick mottlings, the 

 dorsal and super-stigmatal lines white; spiracles as before. Thoracic feet 

 testaceous, abdominal feet black outwardly; a subdorsal orange spot 

 before wart three on joint 12. Venter as black as the body above; warts 

 large, pale yellowish. Hair foxy red, mixed with blackish. 



Tenth stage. — Exactly as in the previous stage; width of the head 2.6 mm. 



Eleventh stage. — Head testaceous brown, labrum, mouth and antennae 

 pale ; width 3. i mm. Body nearly black, with only the merest traces of 

 the lines, the orange spots on joint 12 small; spiracles white. Thoracic 

 feet brownish testaceous, the claspers of the abdominal feet pale; warts 



