346 



PSYCHE. 



[April 1899. 



and Jefferson Counties in the central 

 part of the State. The earliest and 

 latest date of its capture are June thirti- 

 eth and October twenty-sixth. Accord- 

 ing to Prof. Charles Woodworth, formerly 

 Entomologist of the Arkansas Agricul- 

 tural E.xperiment Station, at present of 

 the University of California, this species 

 sometimes lays its eggs in small holes 

 in rocks in stone fences. It is a larger 

 species than would appear from Scud- 

 der's measurements which are 25 mm. 

 for male and female. Average specimens 



in my collection measure as follows : 



Length of body male, 25 mm. female 

 32 mm. 



Length of hind femora male, 17J mm. 

 female 18 mm. 



The tegmina vary from one and a half 

 times the length of the pronotum to the 

 length (male) of the abdomen. The 

 cerci are quite variable and the under 

 side is frequently red as in Mel. clypea- 

 tus Scudd. which is possibly only a syno- 

 nym of Mel. viola. 



THE MOUTHPARTS OF THE NEMATOCEROUS DIPTERA, IIL 



BY VERNON L. KELLOGG, STANFORD UNINERSITY. 



DiXIDAE. 



Dixa sp. The females of Dixa 

 possess a mouth structure (see fig. 4) 

 like those already described, consist- 



ilia, mx / maxillar lobe, >ka;. / maxillar pal- 

 pus, li labium,/^ paraglossa, ;"■/ glossa, liyp 

 hjpophar^nx, 



ing of labrnm-epipharynx (fig. 4, /. ep) , 

 mandibles (fig. 4, md) which are short, 

 weakly chitinized, trowel-shaped, with 

 truncate, distal margin with fine, deep 

 dentations ; maxillae (fig. 4, mx) with 

 5-segmented palpus and max- 

 illar lobe weakly chitinized 

 but long and conspicuous ; 

 strong labium (fig. 4, //) with 

 free paraglossae and glossae 

 fused to form a membranous 

 median lobe ; and hypophar- 

 ynx (fig. 4, hyp) of usual 

 type. 



PSYCHODIDAE. 



Psychoda sp. Psychoda (see 

 fig. 5) has no mandibles and the labium 

 presents but two terminal lobes. The 

 labrum-cpipharynx (fig. 5, /. cp) is short, 

 broad, triangular. The maxillae (fig. 



