FAMILY TACHIXID.E THE TACIIIXIDS 451) 



405. Terjiites of female produced downward and finely ppined. 



SchizocerophaRa Tow^nsend 

 Termites of female normal 'Lixophasa Townsend 



406. Third vein bristled to the .'^mall crossvein; facial ridg-es convex in 



profile Hypertrophomma Town.send 



Third vein with only two or three ba?al bristles; sublateral bristle 

 present 407 



407. Facial depression deep, the parafacials prominent in profile 408 



Facial depression shallow, the parafacials very low in profile, the 



ridges flat; head short (158, 165) Patillalia, n. g. 



408. Frontal vitta linear Argyrochaetona Townsentl 



Frontal vitta not remarkably narrow Microceromacia Villeneuve 



409. Head receding below 413 



Head as long below as at the oral margin 410 



410. Abdomen with strong marginals on the intermediate segments 411 



Abdomen without strong marginals on the intermediate segments; 



vibrissas situated far above the oral margin. 



Masiphya Brauer & Bergenstamm 



411. First vein setulose except apically Microsillus Aldrich 



First vein bare 412 



412. Ocellars present Myothyriopsis Townsend 



Ocellars absent Laximasicera Curran 



413. First vein bare 414 



First vein setulose Houghia Coquillett 



414. Front scarcely longer than the face, more or less convex, not promi- 



nent anteriorly 415 



Front longer than the face, not convex in profile, produced anteriorly; 

 abdomen with discals; apical scutellars erect Meigenia Desvoidy 



415. Ocellars absent or very weak 419 



Ocellars present; discals present or absent 41() 



416. Face unusually flat, the head short; parafacials vei*y narrow below 



(158) 417 



Face not unusually flat, the head more elongate (1). . . .fLydella Desvoidy 



417. Third vein bristled to small crossvein 418 



Third vein with two or three very strong basal bristles (158, 165). 



Patillalia, n. g. 



418. Ocellars very strong (160, 179) Agrarialia, n. g. 



Ocellars short and rather weak (143, 168) Aridalia, n. g. 



419. Abdomen with discals Parathelaira Town.send 



Abdomen without discals 420 



420. Parafrontals each much less than four times as wide as the frontal 



vitta; front not convex; ocellars present 421 



Aldrich, 1025. Pr. Ent. Soc. Wash., Mxvii, p. 133. 

 Curran, 1932. Amer. Mus. Novit. No. 526, p. 11 (Erycia). 



