134 BULLETIN 85, UNITED STATES NATIONAL MUSEUM. 



Genitalia. — Male. — Genital segment small, rounded; forceps long, 

 arched, acuminate, acute at apex; anal valve long, slightly broad- 

 ened at middle, converging toward tip. Described from one male 

 from Acapulco, Mexico (C. F. Baker). 



Type in author's collection. 



Tribe PSYLLINI. 

 MITRAPSYLLA, new genus. 



Body moderately large, not strongly arched on dorsal surface, 

 usually more or less variegated in color. Head not strongly deflexed ; 

 vertex rather large, with a prominent ridge along each side of median 

 line and a furrow between and outside of these ridges, converging to 

 a rather acutely angled apex in front; genal cones very short, porrect, 

 divergent. Eyes somewhat recessive. Antennae long and slender. 

 Thorax rather broad. Hind tibiae with a small tooth at base. Wings 

 subhyaline, broadly ovate, with a pterostigma. 



Type of genus. — Mitrapsylla alhalineata, new species. 



MITRAPSYLLA ALBALINEATA, new species. 



Figs. 78, 79, 249, 300, 465. 



Length of body 2.4 mm. ; length of forewing 2.8 ; width of head 0.91. 

 General color light to dark brown ground color, with white markings 

 and stripes ; vertex with a white stripe on each side near median line 

 and a white spot below each posterior ocellus; pronotum with two 

 white stripes continuing those on vertex; praBscutum with a white 

 stripe on median line and one on each lateral margin; scutum with 

 a median stripe and one on each side; pleurae with several conspicuous 

 white spots. 



Head scarcely deflexed, moderately large, fully as broad as thorax, 

 finely punctate; vertex broad posteriorly, converging evenly toward 

 front, the whole more or less triangular in outline, with a conspicuous 

 ridge on each side of median line (white), and a furrow between 

 these and on the outside of each, produced in front into a rather 

 acute point on each side of median line. Genal cones short, rela- 

 tively thick, depressed a little below level of vertex, divergent, 

 acute at apex, very sparsely pubescent. Antennae long, over three 

 times as long as width of head, slender, apical portion of each segment 

 dark. 



Thorax not strongly arched, coarsely punctate; prasscutum moder- 

 ately large. Hind tibiae with a small spur at base. Wings rather 

 small, subhyaline, more or less transparent, slightly browned or 

 fumate along veins or sometimes the whole surface sUghtly fumate, 

 a little more than twice as long as broad, broadly rounded at apex; 

 pterostigma small, distinct. 



Genitalia. — Male. — Genital segment relatively large; forceps long, 

 thick, simple; anal valve long, broadest at base, slightly constricted 



