Dec.,i9i6 Bulletin of the Brooklyn Entomological Society 97 



cented antepenultimate syllables before one or more consonants. 

 Geocoris, Gomphus, Macrobasis. 



The first factor determining the length of the vowel is its quan- 

 tity in the original derivation. In the case of e and o of Greek 

 roots this is readily accomplished for the long and short sounds 

 in Greek are indicated by distinct letters, eta and epsilon, and 

 omega and omicron. If the Greek root contains eta or omega 

 the vowel in Latin form must be long. Thus meros with long e 

 means the femur and meros with short e means a part. The 

 genera derived from the former must be accented on the long 

 penult. Calyptomerus, Diapheromera, CEdomera, Monodonto- 

 merus, Rhopalomera, Acanthomera. The divisions of beetles, 

 Heteromera, Pentdmera, Trimera, founded on tarsal not femoral 

 characters, and the genus Olig6m,erus, with few antennal joints, 

 accent the antepenult, while Ephemera, lasting but a day, is an un- 

 related word with short e in the penult. 



Soma, meaning body, has a long omega in the original ; stoma, 

 meaning mouth, is spelled with the short omicron. Thus Brachy- 

 sdma, Calosdma, Scaphisdma, but BrachyMoma, Belostoma, Platy- 

 stowxi. 



The Greek word keras, for antenna, is spelled with the short e. 

 Thus, in A croc era, B cede era, Criocerus, Heterocerus, Tetanocera, 

 the accent is thrown to the antepenult. But the wasp Cerceris, 

 appropriating the old Latin name of a bird, takes the accent on 

 the long e of the penult. 



It is the quantity of the vowel of the penult that gives most 

 concern because the position of the accent is determined by its 

 length. 



Apantesis, Calephelis, Caloptenus, Cyllene, Periplaneta, Lepto- 

 trachelus, Euthera, Philerem^us, Phylloxera, Odynerus, Meta- 

 chela, and Zeusera are derived from the long Greek eta in the 

 penult, while Boreus, Cartodere and Diaperis descend from the 

 diphthong ei. Hence all of these have similar accent. 



Emesa, Thereva, Eiimenes, Nemotelus, Ormenis, Oxyhelus, 

 Pdderus, Polymedon, Phryganea, Platy dema, Hypostena and 

 Sepedon, to mention only a few commonly mispronounced names, 

 have the short epsilon in this position and hence throw the accent 

 forward to the antepenult. 



