28 INSECUTOR INSCITLE MENSTRUUS 



unarmed. Legs dark reddish brown, the tarsi somewhat lighter colored. 



Male : Eyes very large, broadly contiguous toward the antennae, the 

 frons in the shape of a very sharp wedge with the three closely approxi- 

 mated ocelli protruding at its posterior end. Antennae blackish browTi, 

 the third to ninth joints fused into a broadly triangular mass, the terminal 

 style over twice the length of this, pale yellov^ash brown and slightly 

 thickened at the tip. Face dark chestnut-brovm, the lower portion 

 lighter and wath gray pruinosity ; deeply grooved aJong the eye-margins, 

 a short impression just below the antennae, thickened in the middle nearly 

 to the mouth, a minute shining tubercle in the shape of an inverted V in 

 the middle. Proboscis black. Palpi blackish, the end joint chestnut- 

 brovsm and not markedly thickened. 



Mesonotum dark, with a yellow-gray median longitudinal stripe which 

 in front occupies more than one-third the entire width, but behind the 

 middle is very shallowly excised ; median stripe bordered at the sides by 

 narrow, deep velvet-black stripes which broaden toward the anterior 

 margin ; sides of disk blackish gray, a black stripe over roots of wings 

 from the transverse suture to near posterior angle. The long lateral 

 ciliation is sooty-brown, the pubescence on the median stripe yellow, on 

 the lateral areas blackish. Scutellum black, dusted yellowish white at base 

 and on the middle. Pleurae dull brown, with dusky-brown pubescence. 



Abdomen dorsally bright ferruginous-red, the lateral margins blackish 

 anteriorly ; venter dull black, the last segment reddish. 



Legs ferruginous brown ; hind femora unarmed, with dense browTi 

 ciliation ; tarsi lighter ferruginous, the first and last joints on all the legs 

 paler and inclining to yellow. Pulvilli and empodia ferruginous, claws 

 black at tips. 



Wings gray marked with yellow ; base, costal cell, and median por- 

 tion of first basal cell smoky brovra, another dark shade passes from 

 above outer hcJf of discal cell to costa ; three irregular pale yellow zones, 

 one near wing-base, the other two involving the crossveins ; a yellow 

 spot on the furcation of the third vein. 



Length: Body 28-35 mm.; wing 23-26 mm. 



Female : Frons broad, parallel-sided, dark ferruginous, with weak lon- 

 gitudmaJ wrinkles ; ocelli small, on a strongly convex, elongate black 

 tubercle. Antennae black, pale at tip, of 1 well-defined joints, the third 

 broadest, the succeeding ones progressively narrowed, the terminal one 

 short, slender, and tapered to a point. Face blackish brown, a promi- 



