AMERICAN DIPTERA. 381 



Habitat. — Washington. 



At the time of publication of this species, Dr. Williston 

 adds the following remarks: — This species is, I believe, a 

 Tar adieus, although it has some of the characters of Blacodes. 

 In size and appearance it is strikingly like T. octopunctatus , 

 and with the exception of the head, the structure is almost 

 precisely the same, and the coloration nearly so. The head 

 and antennas, however, appear to be those of Blacodes or 

 Nicocles. The small cross-veins of the wings in one specimen 

 is nearer the end of the discal cell, as it is in Blacodes; un- 

 fortunately in the other specimen it is near the middle, as in 

 T. octopunctatus. The only characters that I can understand 

 for Blacodes now, are: Abdomen smooth, not clavate, thorax 

 a little more gibbose, third segment of antennas perhaps more 

 fusiform, fourth posterior cell of wing nearly closed and the 

 wings with dark markings. 



Coplmra clausa (PI. XI, fig. 7). 



Blacodes clansus Coquillett, Can. Ent., XXV, 34, 1893. 

 " r^ $. — Length 7—9 mm. — Differs from truncus only as follows: In 

 the female the bloom on the abdomen is much more extended, covering 

 nearly the entire dorsum, but in the male it is confined to the anterior 

 end of the sides of each segment, that on the sides being greatly 

 dilated inward at the posterior corner of each segment. Base of second 

 submarginal cell destitute of a stump of a vein; anal cell closed and 

 short petiolate; brown clouds of wings obsolete or wanting." 



Type.— U. S. N. M., Cat. No. 929. Three males and six 

 females. 



Coplmra fur (PI. XI, fig. 6). 



Aphamartania fur Williston, Tr. Am. Ent. Soc, XII, 53, 1885. 

 " % . — Length 6-5 mm. — Small, black, thickly white pruinose. Head 

 and antennae in structure like those of the species of Nicocles, except 

 that the vertex is not so deeply excavated on the sides of the ocelli. 

 Face and front with a silvery-white pubescence, the former otherwise 

 bare, except a thin row of white hair on the oral margin and the latter 

 with a few white hairs. Antennae black, slender. Thorax thickly 

 white pruinose, bare, except the weak white bristles; dorsum with 

 two slender brown median stripes, and two small, less definite brown 

 spots on each side, the one before, the other behind the suture. Ab- 

 domen rather short and slender, a little broader at the base, not 

 flattened or expanded distally, polished bluish-black; the venter and 

 posterior angles above, not reaching quite across behind on the pos- 



TRANS. AM. ENT. SOC, XXXV. SEPTEMBER, 1909 



