852 Charles Paul Alexander 



altho the segment is very short and is destitute of verticils; the seven 

 succeeding flagellar segments are short-cylindrical, without verticils; the 

 terminal two segments are more elongated and each bears about three 

 very long hairs. 



Eriopterini: Normally there are 16 antennal segments in the tribe 

 Eriopterini. In some genera both elongate and short antennae are found 

 in the same group, as in Ormosia, sews. str. In Chionea, Cladura, Ptero- 

 chionea, and Crypteria the number of antennal segments is reduced, due 

 to the fusion of several segments to make up the basal segment of the 

 flagellum — as in the case of Toxorhina, already discussed — this fusion 

 segment including usually five segments. 



Limnophilini : In the tribe Lminophilini the antennae are normally 

 16-segmented; in the genus Ula they are 17-segmented. In Limnophila 

 and Epiphragma are found some species with elongate and others with 

 short antennae. In Limnophila nmcrocera and some other species, the 

 segments of the flagellum are provided with abundant outstretched hairs. 

 In Adelphomyia cayuga the basal segments of the flagellum are fused into 

 an indistinct fusion-segment; the other local species of this genus have 

 normal antennae. 



Hexatomini: In Hexatoma megacera (fig. 125, g) the antennae of the 

 male are 6-segmented, the flagellar segments being elongate; in the female 

 (fig. 125, h) the antennae are apparently 8-segmented. In Eriocera there 

 are many species with short antennae (Eriocera brachycera, E. fuliginosa, 

 E. fultonensis, and others) , species with the antennae intermediate in length 

 (such as E. eriophora), and numerous species with greatly elongated 

 antennae (E. spinosa, E. californica, E. longicornis, and others). In 

 E. spinosa (fig. 125, f), E. longicornis, and others, the lower surface of the 

 basal flagellar segment is provided with numerous spines, regularly spaced, 

 pointing toward the tip of the organ; the manner in which these spines 

 are used in extricating the organ from the antennal sheath of the pupa 

 is described by Alexander and Lloyd (1914). In E. wilsonii the antennae 

 are likewise elongated in the male sex, but are provided with a strong 

 pubescence, the spines being quite lacking. Most species of Eriocera 

 have short antennae in both sexes. 



Pediciini: In the genera Pedicia and Tricyphona of the tribe Pediciini, 

 the antennae are 16-segmented; in the genus Dicranota and the subgenera 



