REVISION OF THE OECOPHORIDAE — CLARKE 219 



Cryptolechia. With this one exception Inga has been considered a 

 valid genus with the genotype as the only species. From Machimia 

 (sensu Meyrick) I am transferring cretacea (Zeller), canarieUa 

 (Busck) , ohscuroTnaculella (Chambers), concolorella (Beiitenmiiller), 

 ciliella (Busck), and hiimata (Meyrick) and from Cryptolechia 

 {sensu Meyrick), trigama- (Meyrick) to Inga^ bringing to eight the 

 total number of North American species referable to this genus. 



KEY TO THE SPECIES OF INGA BASED PRIMARILY ON 

 COLORATION 



1. Fore wing yellow canariella (Busck) (p. 222) 



Fore wing otherwise 2 



2. Fore wing white or whitish 3 



Fore wing otherwise 4 



3. Costa of fore wing with a conspicuous black spot 



sparsiciliella (Clemens) (p. 222) 

 Costa of fore wing without such spot cretacea (Zeller) (p. 225) 



4. Antennal ciliations 5 ^^ humata (Meyrick) (p. 220) 



Antennal ciliations otherwise 5 



5. Antennal ciliations >^ trigama (Meyrick) (p. 224) 



Antennal ciliations otherwise 6 



6. Alar expanse less than 15 mm obscuromaculella (Chambers) (p. 226) 



Alar expanse more than 15 mm 7 



7. Labial palpus whitish ochreous; basal three-fifths of second seg- 



ment blackish fuscous ciliella (Busck) (p. 227) 



Labial palpus grayish fuscous concolorella (Beutenmiiller) (p. 221) 



KEY TO THE SPECIES OF INGA BASED PRIMARILY ON MALE 

 GENITALIA 



1. Abdomen spined 2 



Abdomen not spined 3 



2. Clasper curved, very thick, heavily spined (fig. 128). ciliella (Busck) (p. 227) 

 Clasper straight, slender basally, abruptly dilated and finely 



spined apically (fig. 129) concolorella (Beutenmiiller) (p. 221) 



3. Clasper slender, bluntly pointed, extending little beyond middle 



of harpe (fig. 127) canariella (Busck) (p. 222) 



Clasper slender or stout, dilated distally, and extending at least 

 to costa (figs. 80, 126, 130) 4 



4. Clasper strongly spined down to sacculus (fig. 130) 



cretacea (Zeller) (p. 225) 

 Clasper with few or no spines as far down as sacculus (figs. 80, 126) 5 



5. Clasper stout, hardly reaching costa (fig. 80) _ sparsiciliella (Clemens) (p. 222) 

 Clasper slender, reaching beyond costa (fig. 126) 



obscuromaculella (Chambers) (p. 226) 



" The antennal ciliations of Meyrick (the relation of the length of the cilia to the width of the antennal 

 shaft) are used here because both humata and trigama are known only from unique males and this character 

 is the only one which can be used safely. None of the other species has antennal cilia as long as 5 or as 

 short as ^4. 



