WILLISTON: APIOCERID^,. 



possibility of the insect feeding upon animal juices, yet it certainly 

 shows that such juices do not form the only food, as in the Asilidae. 



RHAPHIOMIDAS. 



In Rhaphioinidas the palpi are short and rather stout, a projection 

 of the basal plate, without joint. The palpifers are elongate, but 

 much less so than the paraglossae and ligula. They taper gradually 

 from the pointed, slightly curved extremity, and are inserted into the 

 basal, palpal plate by a sharp curve. On their distal portion, there is 

 a very delicate, narrow expansion. Just outside, or rather above, the 

 insertion, there is an elongate pit, with a sharp border, extending over 

 about one-half of the palpal portion. I have not seen this depression 

 in any other species. There is no indication of segmentation any- 

 where on the palpus or palpifer. 



aviv. 



Mouth-parts of Rhaphioinidas Acton Coq. 

 a, paraglosstE, from below; b, ligula, from above; c, palpifer; d, palpus; 

 e, galea, from above; f, labella. 



