AEGYEAMCEBA. 103 



third vein, one on each side ; a small stump on the cross- vein at the base of the third 

 posterior cell. Body deep black ; face and front with short, erect, black pile, mixed 

 with some white hair, especially around the mouth. Abdomen with tufts of white pile 

 on each side of the first segment and some white hairs along its hind margin ; small 

 patches of white scaly hairs on the sides and the hind margin of the third and fourth 

 segments ; the end of the abdomen in the male densely beset with white scales. 



" This description applies to specimens, about 11 millim. long, which I have from 

 Canada (F. X. Belanger), Pennsylvania (E. T. Cresson), and Waco, Texas (Belfrage). 

 But I have two other specimens, from Illinois (Le Baron) and Texas (M. C. Z.\ in 

 which the black spots on the distal half of the wings are so much enlarged that they 

 coalesce and form an irregular, broad cross-band, bifurcate at both ends ; only three 

 brown dots on the apex of the wing are not confluent with this cross-band." (This 

 variety is figured by Van der "Wulp 2 .) 



"A specimen from Georgia (H. K. Morrison) holds the middle between these two 

 forms, its spots being larger than in the first form, and less coalescent than in the 

 second. This last specimen, as well as that from Illinois, measures only 8-9 millim. I 

 have little doubt now that all these specimens belong to A. pluto" 



7. Argyramoeba seriepunctata, sp. n„ s $ . (Tab. II. fig. 5.) 



Head black, the front and face beset with black, erect hairs, amongst which on the front, near the orbits, a few 

 white hairs are mixed ; antennae black, the third joint very short, almost flattened, hemispherical, and with 

 the usual elongate style. Thorax greyish-black, on the dorsum with traces of brownish pollen, beset with 

 longer black and shorter white or greyish-white hairs. Abdomen black, but little shining ; tufts of white 

 hair on each side of the first, and of black hair on each side of the second, segment ; the two following 

 segments, besides the black erect hair, have tufts of white hair on each side, and cross-bands of such hair 

 connecting these tufts ; the following segments have black tufts on the sides, but the same narrow cross- 

 bands of white hairs ; at the end of the abdomen a large tuft of white hair on each side (I describe a well- 

 preserved female ; the pubescence of the male is somewhat rubbed off, but seems to have been very like that 

 of the female). Male genitals black. Legs black, the tibiae and tarsi brown. Halteres brown, white at 

 the tip. "Wings greyish hyaline ; besides the usual stumps of veins on the knee of the second vein and on 

 the fork of the third, there is another stump on the knee, formed by the same fork, which knee, in this 

 species, is particularly salient ; also a trace of a stump within the third posterior cell. Eoot of the wings 

 brownish ; a brown spot at the extreme proximal end of the basal cells ; a series of four brown spots in a 

 straight line— 1, between the origin of the second vein and the proximal end of the discal cell; 2, on the 

 anterior cross-vein and the one adjoining it; 3, on the third vein, in the middle between the second and 

 fourth spots ; 4, at the base of the fork ; a more or less faint cloud between the third spot and the first 

 vein ; a spot at the proximal end of the fourth posterior cell ; smaller spots at the proximal ends of the 

 second and third posterior cells, and on the minute stump within the third cell ; in some specimens, espe- 

 cially in the females, a faint cloud across the proximal half of the sixth vein is visible. The spots and 

 clouds are a little longer in the female than in the male specimens. The costal cell is subhyaline. 



Length 10-11 millim. 



Hdb. Mexico, Northern Sonora (Morrison), Tehuacan (Sumichrast, coll. Bellardi). 



I have a male and a female from Northern Sonora and two females from Tehuacan. 

 N.B. The body of this species is most remarkably like that of A. pluto; the vena- 

 tion is the same ; the whole difference consists in the extent of the dark colour on the 



