206 ENTOMOLOGICAL NEWS. [June, '06 



The antennae of the migrants the only form sent reach about to the 

 base of the abdomen. The two basal joints, as usual, shortest and sub- 

 equal in length ; the first joint cylindrical and originating on the under 

 side of the head ; joint 2 slightly the stoutest and broadly rounded at the 

 apex ; the remaining three joints cylindrical and of almost equal thick- 

 ness ; the third longest, longer than the remaining two combined, being 

 divided by from 41 to 44 rather deep annulations ; the fourth longer than 

 the fifth, with from 20 to 24 annulations ; while the fifth is divided by 

 from ii to 15 annulations, its terminal spur short, stout and truncate at 

 the apex, where it bears three or four short bristles. 



Thorax about as long as broad and slightly broader than the abdomen. 

 Abdomen elongate-ovoid, tapering posteriorly and furnished on each side 

 with four slightly projecting blackish stigmata in front of the nectar pores. 

 Legs normal and provided with sparse short hairs. 



Wings pale dusky, with slightly darker shading along the veins ; the 

 costal cell and the stigma still darker, costa, subcosta and the veins 

 blackish. The first two discoidal veins arise quite near each other and 

 are rather far apart at the hind margin of the wing ; the fork of the third 

 discoidal is unusually long and narrow, while at least two-thirds of the 

 stem of this vein is obliterated ; in rare cases the fork is extremely short, 

 while occasionally the third vein is simple as in Pemphigus. The stigma 

 is long and lanceolate, with the stigmal vein arising about the middle, its 

 basal half gently curved, the rest almost straight and terminating in front 

 of the apex of the wing. The two discoidal veins of the hind wings are 

 at least three times as far distant at the base as those of the front wings. 

 The surface of all of the wings is rather densely scaly. Length of body 

 about 2 mm. ; expanse of wings about 7 mm. 



TRICHOSIPHUM n. gen. 



This is another abnormal genus and undoubtedly nearly rela- 

 ted to the genus Greenidca, which was properly established by 

 Schouteden for Siphonophora artocarpi Westw. Both of these 

 genera agree in the very hairy nectaries, a character not ob- 

 served in any of the other known genera. The principal dif- 

 ferences between the two, in respect to the nectaries, are as 

 follows : In Greenidca the nectaries of the migrant and of the 

 apterous female, pupa, etc., are rather long, slender, almost 

 entirely cylindrical, or slightly narrower at both ends and rela- 

 tively of about the same length ; whereas in the new genus the 

 nectaries of the migrant are extremely long and cylindrical, 

 while those of the apterous females are short, very stout and 

 very distinctly fusiform. This diversity in the size and shape 

 of these organs in the different forms justifies my opinion thai 



