INSECUTOR INSCITI^ MENSTRUUS 115 



A diagram of the mesonotum is shown in Plate IV, figure 2. 

 The general similarity to ciliata is at once evident; but the 

 black spots are larger, there are no continuing posteriorly 

 black lines, but only a narrow track of golden scales. The 

 genitalia, which are carefully figured by Brethes, do not appear 

 to differ perceptibly from the North American form. However, 

 the different mesonotal pattern, coupled with the marked geo- 

 graphic discontinuity, clearly indicates a specific status. The 

 species occurs in southern Brazil and the Argentine region. 



Psorophora holmbergii Lynch Arribalzaga. 



Psorophora holmbergii Lynch Arribalzaga. Rev. Mus de La Plata, 

 ii, 140, 1891. 



The diagram of the mesonotum shown in Plate IV, figure 3, 

 is made up from the very lucid description of Brethes, as no 

 specimen of this species is before me. The golden scales of 

 the forms previously considered are replaced by black ones in 

 the central line, and the central black spots are apparently con- 

 tinued forward and backward to the posterior margin. The 

 species is said to be darkly colored, with nearly black abdomen. 

 It is obviously distinct, and should be easily recognizable. 



Psorophora agoggylia, new species. 



Head uniformly covered with gray scales, rather sparse, 

 showing the dark integument in places. Mesonotum with the 

 central bare spaces separated from the short posterior ones by 

 a line of gray scales ; dorsal line of small black scales, mixed 

 with rufous setae (PI. IV, fig. 4). Abdomen with yellowish 

 gray scales dorsally, a small black point on each side of the 

 middle near the center of each segment ; black lateral patches 

 at the bases of the segments ; venter black, with scattered light 

 gray scales. Legs (and palpi) without outstanding scales, or 

 with but slight roughness in places, the scales in general smooth 

 and recumbent ; femora pale reddish, the apical third black ; 

 tibiae black, with small whitish area at base ; tarsi black, with 

 white rings at the bases of the joints, broad on the hind legs, 

 the first hind tarsal bein? half white. Winsf membrane iri- 



