OF WASHINGTON. 



155 



is much contracted, being slender, dark, and without pale bands. Tip, 

 attenuated; not necessarily decurved. Genitalia, pubescent. Lamellae 

 free, anterior oblong, flattened ; posterior round, flattened. 



Egg: Length .25 mm.; white, oblong. 



Larva: Length 4 mm.; width .5 mm.; body, white, with jet-black 

 head. 



Head (dorsal aspect) as wide as it is long. Occipital lines approach 

 each other beyond the middle, and join in a lanceolate point at the pos 

 terior margin, with three minute shining spots like ocelli arranged along 

 the outside of each line, and one on the inside about the middle. 



FIG. 16. Epidapus scabiei. Left figure, head of larva, dorsal view, greatly enlarged, a, 

 ocelli, b, antenna, c, horny frame of labrum. d, labrum. Right figure, ventral view. 

 a, mandibles, showing position when closed. 



Antennae short, fleshy, cone-shaped, and transparent; situated at base 

 of mandibles, and at anterior end of occipital lines. Ocelli just above 

 base of antennae. Labrum large, projecting beyond tip of maxillae; 

 fleshy, transparent, with black horny frame at base. 



Ventral aspect shorter than dorsal. The horny plates (gence) are 

 joined by narrow strips at the posterior margin, and at the middle, leav 

 ing an open cordate space one-third the length of the head. There are 

 also two small open or light spaces in the trophi ; one rectangular between 

 the cardinal pieces of the maxillae; the other triangular, situated between 

 the base of the maxillae. A small V-shaped, horny piece, probably a 

 rudimentary labium, separates these two small open spaces, and joins 

 together the cardinal pieces of the maxillae at their base. Maxillae large, 

 flattened, horny pieces, with rudimentary palpi in a pale spot at their tips; 

 inner edge serrated, with four large and two small teeth ; outer edges 

 thickened, with two dark, longitudinal elevations and a pale spot posterior 

 to the palpi. When closed, they conceal the mandibles and a greater 

 part of the labrum. 



