-28 — 



The anomolous family HeterogyniidcB has recently been added to our 

 Lists by Mr. Hy. Edwards (En to. Am., 3, 181, Jan, 1888). In habitus 

 and appearance these insects resemble the Psychidte with which they have 

 also the apterous females in common. 



In the male the antennae exceed half the length of the primaries and 

 are pectinated. Palpi and tongue very small, the latter practically wanting. 

 Face very broad. Eyes naked, small, globose. Ocelli wanting. Body 

 slender, with sparse lengthy vestiture, abdomen scarcely exceeding second- 

 aries. The legs are similar m length and vestiture, the median and 

 posterior tarsi shorter and stouter than the anterior— middle tibia with 

 one pair, posterior with cwo pairs of spurs. The posterior femora are 

 densely clothed with fine w^ooUy vestiture. 



Primaries broad, with rounded apices and 

 obliquely rounded outer margin. They have 

 two internal veins, of which the lower is fur- 

 cate basally — veins 8 and 10 are wanting and, 

 except the costal vein, the others are all separate 

 out of the cell at and near its end. 



The secondaries have three internal veins — 

 four veins from the narrow median cell, and 

 two from the base above the subcostal — a most 

 unusual character. The wings are semi-trans- 

 parent ; but sparsely clothed with fine hair 

 like scales. 

 Venation of Heterogynis. The female is apterous, eyes small, mouth 



parts rudimentary. The legs are more membraneous than chitinous and 

 end in a blunt point. The body is naked and inferiorly much dilated — 

 the rnaculation is larviform. The larva is said Boisduaval to be onisci- 

 form and to live openly on Genista. 



Mr. Edwards refers to this family his genera Penfhcfria and Tliia 

 (Ento. Am., 3, 181). The latter is unknown to me but the generic de- 

 scription contradicts the family characters in several important particulars. 

 Penthetria, which I know in all stages through the kindness of Prof 

 Riley, w'ho has made careful drawings of all structural details, differs in 

 every respect— venation — head structure — the fully developed females and 

 in larval history, and ^Ir. Edw-ards has allowed habitual peculiarities to 

 mislead him. The family is an easily recognizable one and I have so 

 fully characterized it that it may be recognized if met with by others.* 



(TO HE CONTINUlin. ) 



* Tlie figures of venation are after Moeschler. Tliey are incorrect in that the 

 dorsal vein of primaries in each figure is simple instead of furcate at base. Otherwise 

 they are accurate, and tlie descriptions mentions these cliaracters correctly. 



