260 Annals Entomological Society of America [Vol. VI, 



On Aug. 12, at same place on leaves were taken: 

 L. sericata: 1 9 — 3, 3, 3, 3. 

 L. sylvarum: 14 cTcf — 3, 3, 3, 3, with 2 ab. br. 



2 c?cf— 3, 3, 3, 3, with 3 ab. br. 



1 cf ' —3, 3, 3, 3, with 4 ab. br. 



1 d" —3, 3, a / be, 3, with 2 ab. br. 



1 9 —3, 3, a .' be, 3, with 2 weak ab. br. 



On Aug. 14, at same place, on leaves were taken: 

 L. sericata: '19 — 3, 3, 3, 3. 

 L. ccBsar: 4 9 9—3, 2, 2, 3. 



L. sylvarum: 5 cfcf — 3, 3, 3, 3, with 2 ab. br. 



1 cf —3, 3, 2, 3, with 3 ab. br. 



2 d'cf— 3, 3, 3, 3, with 4 ab. br. 



1 & —3, a ./ be, ab ! c, 3, with 2 ab. br. 



3 9 9—3, 3, 3, 3, ab. br. lacking. 



And at meat: 



L. ccesar: 2 d'o"- 3, 2, 2, 3. 



21 9 9—3, 2, 2, 3. 



L. sericata: 6 cf cf — 3, 3, 3, 3. 



225 9 9—3, 3, 3, 3. 



1 9 —3, 3, 3, .' abc. 



2 9 9—3, a./ be, 3, 3. 

 1 9 —3, 3, a ./ be, 3. 

 1 9 —3, ac, 3, 3. 



L. sylvarum: 1 9 — 3, 3, / abc, 3, with 2 weak ab. br. 



On Aug. 15, in meadow near Bussey Institution were taken at meat: 

 L. ccBsar: 1 d' —3, 2, 2, 3. 



L. sericata: 8 cf 0^-3, 3, 3, 3. 

 145 9 9—3, 3, 3, 3. 

 1 9 —3, 3, 3, ./ abc. 

 19 —3, a .' be, 3, 3. 

 19 —Si! be, 3, 3, 3. 

 1 9 —3, 3, a .' be, 3. 



On Aug. 29, at Hartland, Vt., by the bank of the Connecticut River at some 

 distance from any house were taken at meat: 

 L. ccesar: 1 c? —3,2,2,3. 32 9 9—3,2,2,3. 



1 9 —3, 3, 2, 3. 

 L. sylvarum: 3 9 9 — 3, 3, 3, 3, with 2 well developed ab. br. 



On Oct. 17, at garbage scow, Boston, were taken at meat: 



In all cases habitus rather than chaetotaxy has been taken as 

 the criterion of specific determination, and this I believe to be 

 more reliable on account of my breeding experiments. By 

 habitus I mean general coloration and slight differences of 

 form which would be very hard to define verbally. The width 

 of the front is also important here. The habits are also some- 

 what different, as may be seen from the observations. L. 

 sylvarum appears to be the wildest form, being without excep- 



