216 KANSAS UXIVERSITY QLARTERLT. 



logical BulletiQ. vol. 1. No. 1. I included P>/reUia suspico. 

 Walk.. P. hasali-^ Walk, and P. n-is Bigot among the svnonvms 

 of violacea Fabr. Bv the time the reprints reached me I was in 

 doubt as to these three species, and so indicated in the copies 

 sent out to my correspondents. Further study has convinced 

 me that in all probability suspicax Walk, is MorcUia bipuncta 

 Fabr.. ha-^oli.^ Walk, is oclriforifs Rond , and that iris Bigot is 

 doubtful. 



The wing of this species is shown in figure 6, and the tho- 

 racical chct'totaxy in figure 5. 



Morellia nigricosta, nov. sp. 



Two males and three females : Chapada ; November and 

 .January. 



Dark metallic blue, green, or purple, with scarce a trace of 

 pollinose coating even by the most oblique light. Abdomen 

 without macrochiettp. Legs brown to black. Bucca wholly 

 black and shining. Antenme, palpi and halteres yellow. 

 Wing with a dark brown mark along the costa. the transverse 

 veins clouded with brown, and these clouds joined by an ob- 

 lique brown band ; third vein with only three to five spines, all 

 at the extreme base. Length. 6 to 8 mm. Dorso-ventral 

 diameter of head, 1.7 mm. : of bucca. 0.4 ram. 



The head of the male is almost precisely like that of M. ochri- 

 facies Rond.. the only differences being- (1) Third antennal 

 joint longer, being nearly three times the second; (2) arista 

 less densely plumose; (3) bucca wholly black and shining, 

 not appearing at all pollinose, whatever the incidence of light ; 

 (4) the gena is considerably narrower; (5) the great ocellar 

 bristles are divergent ; (6) the outer verticals are not differen- 

 tiated ; I 7 I the cilite of the posterior orbit are less well devel- 

 oped, and on the occiput, parallel with them, I can see no rows 

 of bristles. The head of the female has a width of 2.7 mm., 

 and the front, at the narrowest part, which is at the junction 

 of the ventral and middle thirds, measures O.H mm. From 

 this narrowest point the front widens a very little toward tlie 

 antennae and considerably toward the vertex The bucca is like 

 that of the male. The ventral third of the geno-vertical plate. 

 the gena, the vibrissal ridge and the ventral half of the pos- 

 terior orbit are silvery white pollinose. The dorsal two-thirds 

 of the geno-vertical plate, the vertical, the occiput, as far as I 



