4() BULLETIN BROOKLYN ENTOM. SOC. VOL. VI. August 1883. ] 
Pieris have been subdivided into two or by some authors three or more 
genera, but I can not convince myself that they are distinct. Each of 
the genera has a color appearance that renders it easily recognizable. 
The Nymphahdae are much more numerously represented in our 
fauna, and they have been divided into several sub families, to which 
some authors accord family rank. They may be distinguished as follows. 
Secondaries not grooved for the reception of abdomen. 
Wines marrows ourenmarcim ronnded -) een ee. -:- 1). ) 7 ia cree Heliconinae, 
Secondaries with groove for reception of abdomen. : 
Palpi short. 
Veins not dilated at base. 
Subcostal nervure 5 branched, discal cell of secondaries evidently closed 
Danainae, 
Sub costal nervure 4 branched, discal cell of secondarics open, or closed by a 
WeLyeslenderwveltl ets oe. c.0<) sie SAB yc 24) oleae Nymphalinae.§ 
Veins dilated at base. 
IDiscall Gall oF SeComclamES OSM, os55->5sc0saeeasdsvsesse- .-Nymphalinae.§ 
iDiceal Gall oir se@omelannes @lOSeCh | oo. 2 ods deoses5 enna sao od c Satyrinae. 
Palpi very long, projecting into a horizontal snout........... Were Ss Libytheinae. 
The Heliconinae are sparingly represented in our fauna, and there 
is only one species (¢harioniz) that has any claim at all to be considered 
as properly belonging to it: some others are occasionally found not far from 
the southern borders and these I include. The genera are, 
Internal nervure of secondaries present. 
Median nervure 3 branched wings diaphanous. 
Antennze moderate, thorax stout, wings elongate rounded ; secondaries rather 
SNORE a ae ecco ly. Sa Rae eee oll oe Dircenna. 
Antenne long, thorax small, secondaries muchelongate.............. Ithomia,* 
Median nervure of secondaries apparently 4 branched................ Mechanitis, f 
Internal nervure wanting. 
head sproadweyeSnveny prominent qiaite nize mlONGe ne te ee eee Heliconia. 
The genera all look very much alike and the insects are all very 
brightly colored and handsome. 
The Danainae have but a single representation genus here. i. e. 
Danazs easily known by the family characters and a peculiar swelling or 
raised black spot on the secondaries of the <j. 
§ Ceratina as used by Strecker in his catalogue is only a § of Ithomia. 
t Apparently only, for it is merely the junction of the discoidal nervure with the 
3rd which gives the former the appearance of a 4th branch. 
