Two new Strepsipterous Insects. 59 



Long. corp. ^ uric. Exp. alar. -£-g unc. 



Variat genis luteis, clypei puncto concolori, vel disco omnino 

 nigro. 



Habitat in Epiro, in rubis exsiccatis. (An species distincta?) 



The dissimilarity in appearance between this and the preceding 

 species is very striking, but although I am inclined to consider the 

 difference as resulting from parasitical attack, it would perhaps be 

 hazardous to assert this without further proof. It is, however, 

 remarkable that all the male parasites which I have obtained were 

 derived from these pale-coloured specimens, whereas the apterous 

 females were restricted to the former, — a circumstance not un- 

 worthy of attention, as connected with the physiology of sexual 

 development. 



Sp. 3. Hylceus gibbus. 



Niger, gibbosus ; genis tibiisque anterioribus antice, luteis ; 

 posterioribus ad basin, intermediis vix, tarsorumque quatuor 

 posteriorum articulo primo, albicantibus ; antennis subtiis 

 ferrugineis ; prothoracis lineola interrupts, tenui, humeris, 

 alarumque squama, flavescentibus; abdomine nigro; alis 

 fuscescentibus, venis piceis. Femina. 



Long. corp. 3 lin. Expans. alar. 4| lin. 



Habitat in Epiro, prope Sinum Ambracicum, in gallis querceis. 



The Hylecthrus Quercus was obtained from this species, the 

 abdomen exhibiting irregular rufous patches in some specimens 

 parasitically affected. 



