xNO. 2227. FLIES FROM GUAM AND THE PHILIPPINES— PARKER. 93 



posterior spiracle dark brown or blackish; those of spiracular cover 

 dark colored, sometimes faintly yellov/ish at tips forming a narrow, 

 yellow border, 



^Vings. — Bend of fom'th vem a right or a very slightly acute angle; 

 anterior cross-vein slightly more basal than end of fii-st longitudinal; 

 third vei bristly (about two-thirds or three-fourths of distance to 

 anterior cross vein); costal spine vestigial; section III of costa 

 equal to or slightly greater than section V; alulae fringed with 

 hair; calypters whitish, margins fringed with white hair. 



Legs. — Dark. Posterior femur clothed beneath with short hairs; 

 anterior face with three rows of bristles, those of intermediate row 

 shortest, weak and absent distally, those of lower row few and 

 scattered; posterior ventral row of bristles present 

 on proximal half only: tibia straight or slightly 

 curved, beards absent: tarsus approximately same 

 length as tibia. Middle femur with short, scattered 

 hairs beneath; anterior and posterior ventral rows 

 of bristles complete, bristles of their distal halves 

 weak and inconspicuous, "comb" not developed: 

 submesotibial bristle present. Ventral surface of 

 anterior coxa with an irregular row of bristles at fig-2.-sarcopha- 



O GA. CKENITA. (SAME 



each side only. lettering as in 



Clmetotaxy. — Dorsocentrals strongly reclinate. An- ^igi-) 

 terior dorsocentrals quite long, slightly longer than anterior pairs of 

 postsuturals ; acrostichals present; inner presuturals absent: four 

 pairs posterior dorsocentrals, the two anterior pairs much the weaker 

 though considerably longer than vestiture of scutum; praescutellar 

 acrostichals present; scutellar apicals present: three stemopleurals : 

 lower stemopleura with bristles only. 



Abdomen. — Somewhat conical or slightly oval, clothed above 

 with short, reclinate bristles, beneath with longer, more erect hair 

 that does not become longer on fourth notum. Vestiture of fourth 

 ventral plate shortest and strongly reclinate or decumbent. 



Chaetotaxy . — Second segment without marginal bristles; third with 

 two; fourth with complete row. 



Genital segments. — Not prominent, usually only second segment 

 and membranous band between it and first showing. First, ground 

 color, brownish, faintly grayish pollinose, in profile slightly arched, 

 margmal bristles absent, vestiture short and sparse: second, very 

 noticeably flattened, blackish, vestiture longer than that of first; 

 anal area small and extending above middle of posterior surface. 

 Forceps black or blackish, base without upward flap-like extensions 

 or at most these are short and inconspicuous, vestiture shorter than 

 that of second segment; prongs approximated for about two-thirds 

 their length, then separated and bent prominently forward, each tip 

 with a minute tooth. 



