XXXIX. FAMILY TRYPKTID^). 



Fig. in. Straussia longipenms, enlarged. After Kellogg. 



Head hemispherical; face nearly vertical in profile, or 

 somewhat retreating, without distinct vibrissae. Front 

 broad, bristly on the sides, the lower fronto-orbital bris- 

 tles situated close to the border of the eyes. Antennae 

 decumbent, short, rarely elongated. Abdomen composed 

 of four or five segments; genitalia of the males but little 

 exposed; the ovipositor jointed, more or less projecting, 

 Wings rather large ; auxiliary vein present, ending steep- 

 ly and obscurely in or near the border; posterior basal 

 cell and the anal cell distinct, the latter often drawn out 

 into an acute, often prolonged, point. Wings usually 

 with dark markings. Legs moderately long; tibiae with- 

 out preapical bristle. Proboscis moderately long, usu- 

 ally with broad labella; sometimes long, and the narrow 

 labella folding backwards. 



This family comprises a large number of rather small 

 flies usually with prettily marked wings. The larvae are 

 not elongate, conical and round ; the posterior stigmata 

 lie free in two separated small, chitinous platelets, form- 

 ing three radiating depressions; antennae short, two- 

 jointed; mouth booklets separated, thick and strong; 



anal end somewhat impressed, often in the middle with 



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