100 INSUCUTOR INSCITIiE MENSTRUUS 



The eyes each show in front view almost as great width as the 

 front and face, these being nearly as wide as one-half their 

 combined height ; the wide eyes, of the full height of the head, 

 separated by the wide front and face, give a striking effect of 

 hypertrophied eye-surface when viewed from in front, which 

 is not shared by any other known muscoid form even though 

 it may possess proportionately to its size as great ocular area. 

 Facial plate deeply sunken, broad below, subtriangular, facialia 

 bare ; parafacials bare, very narrowed below. One strong 

 decussate pair of frontals about even with base of antennae, 

 a weak bristle above and below it ; two proclinate and three 

 reclinate f ronto-orbitals, outer vertical only a little shorter than 

 inner one, strong pair of divaricate-proclinate ocellars. Fron- 

 talia not as wide as parafrontals. Second antennal joint short, 

 third joint reaciiing exactly to oral margin ; arista thickened 

 slightly on less than basal half, basal joints very short. Probos- 

 cis very short and fleshy ; mouth subatrophied, the oral open- 

 ing apparently non-functional ; palpi about as long as the 

 proboscis, greatly enlarged on distal two-thirds, bowed, fat, 

 swollen, smooth, pollinialike, their surface practically abso- 

 lutely bare even of miscroscopic hairs (only one or two were 

 unmistakably made out with great difficulty ). Cheeks ex- 

 tremely narrow, same width as lower end of parafacials. Abdo- 

 men vaulted, short-ovate, first segment without median marginal 

 macrochsetse, second with a median marginal pair and a lateral 

 marginal pair, third and fourth segments with marginal row. 

 Tarsi very short, the metatarsi about as long as the other joints 

 combined. Hind tibiae very loosely subpectinate. Third vein 

 bristled to small crossvein. Costal spine vestigial. Apical cell 

 open, ending very distinctly before wingtip. Cubitus rounded, 

 without wrinkle or stump. Hind crossvein straight, nearer to 

 cubitus, at an angle of about 45 degrees to hin,d margin of 

 wing. Small crossvein opposite end of auxiliary vein. Houghia 

 approaches this genus in a number of characters. 



Hypertrophomma opaca, new species. 



Length of body, 4.75 mm. ; of wing, 3.75 mm. One female, 

 lona. New Jersey, October 2, 1910. 



