242 Mr. A. Gr. Butler on four new Sj^ecies of 



back of tlie stipe, and attaining an extraordinary length as 

 compared with their breadth. 



Loc. Eare in the upper beds of the ^^kiddaw Slates, Eller- 

 gill, near Milburn, Thornship Beck, near Shap, and Eggbeck, 

 near Pooley. 



EXPLANATION OF PLATE XI. 



Fir/. 1. Specimen oi Diclwf/rapsus fragilis, n. sp., nat. size. 



Fig. 2. The same, enlarged. 



Fig. 3. Portion of the same, enlarged still further, to show the cellules. 



Fig. 4. Portion of Dichograpsus annulcdus, n. sp., showing the transverse 



ridges. 

 Fig. 5. Portion of the same, enlarged. 

 Fig. G. Tfigonograpsus lanceolatus, n. sp., enlarged. 

 Fig. 7. Diplixjrapms Hopl;inso7ii, n. sp., enlarged. 

 Fig. 8. Diplograpnus annatus^ n. sp., enlarged. 

 Fig. 9. Portion of Diplogmjmis Hiighesi, u. sp., greatly enlarged, to show 



tlie cellules. 

 Fig. 10. Diptlograpsus Hiighesi, enlarged. 

 Fig. 11. Diplograpsiis sinuattis, n. sp., enlarged. 

 Fig. 12. Diplograpsus bimucronafus, u. sp., enlarged. 

 Fig. 12'. Fragment of another specimen of D. himiicronatus, enlarged, to 



show the cellules. 

 Fig. 13. Diplograpsus insectiformis, n. sp., enlarged. 

 Fig. 14. Upper portion oi Diplograpsus vesicidosus, n. sp., slightly enlarged. 



(The serration of the margin in this figure is too pronounced.) 

 Fig. 15. Portion of D. vesicnlosus, enlarged, showing the cellules, axial 



tube, and base. 

 Fig. 10. ClimacograpsKS innotatus, n. sp., enlarged. 



Fig. 17. Portion of C. itinofafus, greatly enlarged, to show the cellules. 

 Fig. 18. ClimacograpsKS tuherculatus, n. sp., enlarged. 

 Fig. 10. Graptolitcs argcntcus, n. sp., enlarged. 

 Fig. 20. DidgmograpsKs affinis, n. sp., enlarged. 

 Fig. 21. Didymograpsus fasciculatus, n. sp., enlarged. 

 Fig. 22. Portion of D, fascictdatus, still further enlarged, to show the 



cellules. 



XXVIII. — Descrij)tions of four new Species of Diurnal Lepido- 

 ptera of the Genus Thyca, Bj A. G. BuTLER, F.L.S. &c. 



Genus Thyca, Wallengren. 



1. Thyca Ithiela^ sp. nov. 



S . Alec supra nigroo : antica) velut in T. Hors^feldii cincrco plagataj 

 ct maculatoe : postietc macula magna snbcostali suhovali aureo- 

 tlava apud basin posita, maculis quinqnc discalibns, serie an- 

 gular! vclut in T. Ilors/ieldit positis, macnlisquc quinqnc cine- 

 rasccntibus semicirculanbns subniarginalibus ; area abdomiiiali 

 cinerca, baud flavo maculata : corpus nigro-cincreum, antennis' 

 nigris. 



Also subtus fero velut in 2\ Ilorsjiddii, maculis autcm posticarum 



