104 GEO. D. HULST. 



The two end members are oval cylindrical or conical, the last one 

 never on the extreme end of the penultimate member, but on one 

 side, never so far as to be joined at the base and thus geminate with 

 it upon the summit of the antepenultimate member. The hair brush 

 is always on the last member, is always more or less developed on the 

 penultimate, and there always more strongly, as the point of union 

 with the end member retreats from the extreme summit. Where 

 the point of union is near the base the maxillary palpi become 

 almost, if not quite equally bitufted, exactly reproducing the struc- 

 ture and ornamentation of certain of the Epipaschiidre. 



Tongue. — The tongue is generally present, though sometimes en- 

 tirely wanting. Where it is longest, it is nearly as long as the thorax 

 and abdomen ; it is with rare exceptions, if any, horny, rolled and 

 scaled in front at the base. 



I have noticed in many cases a decided difference in this organ 

 between the Phycitidse and the Geometridse, though I have not suffi- 

 ciently observed to warrant any generalization upon it as a family 

 distinction. In the Geometridse tlie extreme end of the tongue is 

 furnished with minute, upright, cylindrical papillse, equal in length 

 to about one-third the diameter of the tongue itself. In the Phy- 

 citidre, in all specimens examined, these papillte do not exist, and are 

 replaced by overlying laminje. 



There is also in the Phycitida) a reciprocal relation between tlie 

 tongue and the pal})i, both labial and maxillary, which, though not 

 universal, suggests some affinity which is of interest. In the great 

 majority of cases where the tongue is strongly developed, the labial 

 palpi are comparatively small and generally erect ; in the most of 

 cases where the tongue is weak or wanting the labial palpi are ex- 

 aggerated in length, and are more or less horizontal. Even in ex- 

 ceptions the tongue, though long, is generally less horny where the 

 palpi are long and horizontal. The tongue is generally best devel- 

 oped in those species which have the tufted maxillary palpi, and the 

 occurrence of this development is rare where the tongue is weak or 

 wanting. On the one side is shown a strong tendency to the struc- 

 ture of the Epipaschiidffi, on the other to that of the Crambidie. 

 Apart from these tendencies this recipi'ocal relation of these organs 

 is to me of very great interest. 



Front. — The front is generally somewhat quadrate, generally, 

 thouo-h not always longer than broad and rarely quite narrow. The 

 clypeus is generally flattened or slightly rounded, rarely grooved and 



