404 LIST OF DIPTEKA. 



Asilus Caudex, n. s., mas. et fern. Niger, thoracefulvo, vittis qua- 

 tuor nigris, pectore cano, abdominis lateribus, mari. fulvo-albo 

 vittatis, fern, abdomine cano bivittato apice compesso, antennis 

 pedibusque nigris, alisfuscis. 



Male. — Body black : head very nearly as broad as the chest, 

 covered with tawny down, thickly clothed beneath with white hairs ; 

 hind part clothed with a few whitish hairs, and beset with a row of 

 black bristles ; crown beset with some black hairs ; clypeus promi- 

 nent, thickly armed with black bristles, and in front clothed also 

 with some whitish hairs : eyes dark bronze ; fore part flat, its facets 

 much larger than those of the other part : lip black, shining, clothed 

 at the tip with short hoary hairs ; palpi black, thickly beset with 

 long black bristles : feelers black ; first and second joints clothed 

 with black hairs ; second joint not near half the length of the first ; 

 third joint spindle-shaped, much shorter than the first ; bristle nearly 

 thrice the length of the third joint : chest tawny, clothed with black 

 hairs, beset on each side and behind with some black bristles, 

 adorned with four black stripes ; middle stripes narrow and linear ; 

 side stripes broad, especially on the hind part, each interrupted by 

 three oblique tawny bands : breast hoary, partly clothed with black 

 or hoary hairs : abdomen black, narrower than the chest, and rather 

 more than twice its length, hoary beneath, tapering from the base to 

 the tip, clothed with whitish hairs, which decrease in length from 

 the base to the tip ; each side adorned with a tawny stripe, which 

 changes to white on the sixth segment ; seventh and eighth seg- 

 ments silvery : first and second segments very short ; second seg- 

 ment arched, beset with black bristles on each side ; third and fol- 

 lowing segments long, successively, but slightly decreasing in 

 length ; sexual parts shining, very large : legs black, clothed with 

 black hairs, beset with black spines ; foot-cushions dark tawny : 

 wings brown, darker towards the base ; wing-ribs and veins black ; 

 poisers tawny. Fern. — Abdomen much more than twice the length 

 of the chest, compressed and very slender for one-third of its length 

 from the tip ; side stripes hoary along the whole length. Length 

 of the body 9 — 11 lines ; of the wings 12—14 lines. 



a. Jamaica. From Mr. Gosse's collection. 



Asilus Marcinus, n. s., fern. Ferrugineus y thoracis vittis tribus 

 piceis, abdomine nigro cinereo -bivittato, apice compresso tenui, 

 segmentorum marginibus posticis ferrugineis, antennis pedibusque 

 nigris, alisfuscis. 



Head black, as broad as the chest, covered with dark tawny 

 down, clothed with black hairs on the crown, behind and beneath, 

 beset behind the eyes with black bristles ; clypeus very prominent, 



