A. S. Packard, Jr., on Injects inhahiting Salt water. 



the body. The anal segment is broad niMl Hat, S41UUV 

 tip, but a little rounded at the corners: it is neariy as 1. 

 the greatest width of the body. From a traiis\-oi-st' tor 

 slit (not seen from above) projects a group ot' about ton 

 ting respiratory filaments, white and linely cihatod to tli 

 the filaments being each a little over half as long as tin 

 segment. A little within the middle of this segment is a 

 long slit, with thickened chitinous edges. A few hairs of 

 ing length are scattered over the body. Length -80 of an 

 This is, so far as I am aware, the first instance of the < 

 rence of this genus in salt water. 



Ephydra Californica, n. sp. (Fig. 4 ; a, 

 teiyal, 6, ventral, c, lateral view of the 

 ])it])a.) — Several specimens of the larvae 

 of this species occurred, though the pupae 

 were far more numerous. Unfortunately 

 none of the adults were found, but as the 

 puparia are abundant and the flies ccnild 

 easily be reared from them, I venture to 

 name the species. 



The larva closely agrees with that of the European K. npa- 

 ria Fallen, described by Loew, but has one laore ])air of ahdont- 

 inal legs, or tubercles. The body is white, lon.a and slender. 

 cylindrical, the sides of the segments bulging out, and each 

 abdominal ring has tlu-ee transverse, broad, flat tergal ridges: 

 the thoracic segments being smooth above. The anterior en<l 

 of the body, including the thoracic rings, tapers gradually, 

 being subcorneal and truncated abruptly. The three thoracic 

 segments are smooth, but minutely hairy on the anterior edge, 

 the hairs being similarly arranged on the abdominal segments 

 The head is very small; the mandibles exist in the form of 

 acute, curved, chitinous hooks, with a pair of papillifomi anten- 

 nae (?) behind ; and a pair of shorter tubercles (rudimentary 

 palpi ?) in front of them and just behind the mandibles.* The 

 upper side of the body and base of the respiratory tubes are 

 covered with very minute fine stiflf hairs, and there is a row of 

 them on the front edge of the prothoracic rings. On the front 

 edge and on the sternal side of the mesothoracic nng is a dark 

 chitinous, t transversely oblong area, with four clear pale dots, 

 arranged in a transverse row, the space in front being broken 

 up into chitinous spots ; in other specimens this band is much 

 narrower and less distinct. The integument on the tergal side 



' These parts need to be studied in the living insect. Tliey are n 



