ORISMOLOGY. 293 



4-. OBSCURE (Obscurus). A surface which reflects the 

 light but little. Ex. Ptelobius Hermanni. 



5. OPAQUE (Opacus). A surface which does not re- 

 flect the light at all. Ex. Trox sabulosus, arena- 

 rius. Silpha opaca. 



vii. TRANSPARENCE. 



1. HYALINE (Hyalina). The clear transparency of 



glass. Ex. The Wings of many Ncuroptera, Hy- 

 menoptera, and Diptera. 



2. DIAPHANOUS (Diaphana). Transparent, but less 



purely than hyaline. Semitransparent. Ex. The 

 Wings of many Colcoptera. 



3. ADIAPHANOUS (Adiaphana}. Which does not trans- 



mit the light at all. Ex. Elytra of Coleoptera. 



viii. PAINTING. 



1 . ATOM (Atomus). A very minute dot. 



2. IRRORATE (Irrorata}. Sprinkled with atoms, as the 



earth with dew. Ex. Onthophagus Vacca. Pa- 

 pilio Paris. 



3. GUTTA (Gutta*}. A roundish dot intermediate in 



size between an atom and a macula. 



4. GUTTATE (Guttata}. Sprinkled with guttce. Ex. 



Coccinella. 



5. MACULA (Macula}. A larger indeterminately shaped 



spot. 



* Linne in Coccinella has employed the term Gutta for a white or 

 yellow spot in a darker ground, and Pustula for a red spot in a black 

 ground. We thought one term sufficient to express spots bigger 

 than atoms. 



