MUT. 11 SIPHOSTURMIA AND ALLIED GENERA REINHARD 9 



KEY TO SPECIES OF SirHOSTURMIOPSIS 



1. With four sternopleurals ; mid tibia bearing two bristles near 



middle on front side ; palpi yellow ; fourth abdominal segment 



in female longer than third, depi-essed, apex pointed 2 



With three sternopleurals; mid tibia bearing one bristle near 

 middle on front side ; palpi usually black ; fourth abdominal 

 segment in female ordinary, apex truncate — (Sturmia) phyciodis Coquillett 



2. Apex of abdomen black; parafacial at narrowest one-third width 



of face below; ocellars strong (female only) melampyga, new species 



Apex of abdomen yellow ; parafacial at narrowest nearly one- 

 half the width of face below ; ocellars small in female, hair- 

 like in male rafaeli Townsend 



SIPHOSTURMIOPSIS RAFAELI Townsend 



Slphostunniopsis rafaeli Townsend, Ins. Insc. Menst., vol. 8, p. 91, 1915. 



A rather robust species like S. r?ielampyga, from which it differs 

 most obviously in having the apex of the abdomen reddish-yellow. 

 The parafacials are wider; the second antennal joint is one-half as 

 long as the third in the female; and the ocellar bristles, in both 

 sexes, are poorly developed, almost hairlike in male. These items 

 with the description appear sufficient to distinguish the species. 



Type locality. — San Rafael, Vera Cruz, Mexico. 



SIPHOSTURMIOPSIS MELAMPYGA, new species 



Female. — Front at vertex 0.35 of head width in both specimens, 

 widening only slightly below, with gray pollen more or less tinged 

 with yellow toward vertex; median stripe reddish, not narrowed 

 before triangle, where the width slightly exceeds that of the para- 

 frontal; the latter with numerous fine hairs, which extend close to 

 the border of the eye; inner verticals strong, reclinate, the outer 

 about three-fourths as long, curving backward and outward ; frontal 

 bristles about eight in a row, the uppermost one largest, reclinate, 

 the lowest one at middle of parafacial and on level with apex of 

 second antennal joint; a secondary irregular row of three or four 

 frontals outside of the main row on lower part; ocellar triangle 

 bearing a pair strong proclinate bristles and numerous erect hairs, 

 })ostocellars well developed ; orbital bristles present ; parafacials dis- 

 tinctly narrowed downward but at narrowest point much wider 

 than third antennal joint, densely gray pollinose, with a weak 

 bristle and several pale hairs beneath lowermost frontal, bare below ; 

 face covered with thick gray pollen, very flat with the lower 

 border protuberant ; ridges bare except a few bristles and hairs near 

 base ; vibrissae somewhat approximated and situated well above the 

 oral margin; first and second joints of antennae reddish-yellow, 

 third black, one and one-half times the length of second joint; 



