194 tHfi BNtOMOLOQIST's RECORD. 



laggards died before pupatiou. The larvai of this latter cross 

 were much darker than the larvtu of either parent species, many of 

 them being of a dark purple hue, with a slight bloom on the darker 

 areas. A moderate proportion have the bar weak, but the larger 

 number follow the ^ parent in having the /^ joined at the apex. In 

 other words there seems to be a tendency with the hybrid larva3 to 

 follow the form of the 2 parent, and a stronger tendency to follow the 

 T. hidortata form. 



The moths commenced to emerge about June oth, and by the 8th 

 ten specimens of the cross (X No. 1) Ijetween g T. ab. ddamerensis x J 

 T. histortata had emerged. Tliey continued to come out at first rapidly, 

 and afterwards more slowly, till the cud of the month ; none emerged 

 dming the first fortnight of July, but on the IGth they again com- 

 menced, and continued to do so at intervals until the middle of 

 September, a last emergence about the end of the mouth bringing 

 the total number of specimens up to 58, and a single pupa is lying 

 over till the spring. The whole of this brood were S s, 29 take after 

 the S parent, being dark, mostly mottled and streaked with white ; 

 the remaining half do not, to my mind, differ greatly from the second 

 brood of T. bistortata, uo strictly intermediate forms being present.* 



Moths of the reverse cross (X Dr. R.) betwecu g- T. bistortata x ? 

 T. ab. delantcrensh commenced to emerge a])out Juue 7th ; the greater 

 portk)n of the jjrood came out before the end of the month, but a few 

 straggled out during July and August. None arc lying over. Twenty- 

 one specimens emerged, 11 <? s and 10 ? s. This brood is more varied 

 as regards coloration than the first mentioned, some six or seven 

 specimens being transitional between the pale whitish and brown-grey 

 of T. crepnscularia and T. bistortata on the one hand, and the mclanic 

 hue of T. ab. delamerensis on the other. 



Moths of one brood (X No. la) of the cross between ^ T. bidor- 

 tata X ? T. crepuscuJaria commenced to emerge at the same time 

 as the previously mentioned hybrids. The bulk of the brood was out 

 before the end of the month, only a few stragglers appearing during 

 July. No pupaj are lying over. Twenty-one si)ecimens emerged, 14 

 (? s and 7 $ s. Although the stock from which the j parent springs 

 produced about equal proportions ol typical T. crepuscularia and its 

 ab. delamerensis, no trace of mclanic coloration is traceable on the 

 wings of the hybrid moths. 



The second brood of the cross (X No. 2a) betAvcen $ T. bistortata 

 X $ T. crepuscularia was much later than the last mentioned. The 

 bulk of the moths emerged late in June or early in July, two very 

 late emergences taking place late in September. None lying over. I 

 have nine specimens, 6 j s and 3 ? s. The remark made with 

 reference to the other brood of this cross applies to this brood also, uo 

 trace of melanic coloration being present. Four of the moths are 

 excessively small, and poorly marked, and one of these is crippled in the 

 secondaries. The larvai of this brood were unhealthy, weakly, and, as 

 previously mentioned, some of them were very backward. 



* For a full and complete account of the forms produced, and the results 

 obtained by hybridising the two species, vide the paper by Mr. J. W. Tutt, in the 

 Transactions of the Ent. Soc. of London, Pt. I., 1898. My own knowledge of the 

 species in their perfect stage is insutiicient to allow of my treating this portion of 

 my subject in detail. These notes were written last November, before the public- 

 cation of Mr. Tutt's paper. — A.B. 



