190 genus gargaphia 



Distributional Groupings of Species 

 The grouping as here Hsted is also an aid to the identification 

 of species. The definite hmits of distribution of only a few 

 species are known, hence the following should be considered 

 merely as a guide: 



Northern United States — tiliae Walsh. • 



Eastern United States — amorphae Walsh, tiliae Walsh, iridescens Champion, 



angulata Heidemann. 

 Southern United States — tiliae Walsh, fasciata St&l, angulata Heidemann, 



solani Heidemann. 

 Southwestern United States — carinata Giljson, condensa Gibson, albes- 

 cens Drake, iridescens Champion, opacula Uhler, angulata Heidemann, 



solani Heidemann. 

 Western United States — opacula Uhler. 

 Central America (including Mexico) — panamensis Champion, patricia St&l, 



nigrinervis St§.l, vanduzeei Gibson. 

 South America — lasciva Gibson, magna Gibson, nigrinervis StS.1, formosa 



StS,l, trichoptera St§,l, subpilosa St§,l, flexuosa St&l, lunulata Mayr, munda 



St§,l, obliqua St&l, tricolor Mayr, simulans Stil. 



Key to the Species 



1. Costal area of elytra with less than four rows of areolae at its widest 



part 10 



Costal area of elytra with four or more rows of areolae at its widest part . .2 



2. Membranous margins of i)ronotum angularly expanded 3 



Membranous margins of pronotum rounding 5 



3. Frontal spines produced, at least one-half the length of the basal segment 



of the antennae 4 



Frontal spines not produced, very short, mere stul)s . . angulata Heidemann 



4. Angle of the membranous margin of pronotum sharj), ])ointed. Hood 



small nigrinervis StS,l 



Angle of the membranous margin of pronotum not sharj) or jiointed. 

 Hood large solani Heidemann 



5. Length of the discoidal area noticeably less than -one-half the length of 



elytra; narrow, in width about equal to the subcostal area G 



Length of the discoidal area about one-half the length of elytra, width 



greater than subcostal area 7 



G. Length of discoidal area barely one-third the length of the elytra. 



panamensis Champion 

 Length of discoidal area slightly more than one-t hircl tlic length of elytra. 



magna new sjjecies 



7. Subcostal area with but two rows of areolae 9 



Subcostal area with three rows of areolae 8 



,8. Apical angle of discoidal area about median tiliae Walsh 



Apical angle of discoidal area at the outer side amorphae Walsh 



