450 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.43. 



APraOCH^TA EPEIRffi Brues. 



A very distinct species allied to the above in the form and bristling 

 of frons. The thorax and scutellum are entirely yellow, and the 

 abdomen has generally four black spots, two each on the lateral 

 surfaces of the first and second segments; a tuft of black bristles is 

 situated in the center of the black part on second segment; the hind 

 femora are entirel}'' yellow; the costa in middle is distinctly dilated 

 and yellow, whereas in the foregoing species it is not swollen at this 

 part and is black-brown; it is also a rather smaller species, and the 

 anterior pair of scutellar bristles are greatly reduced. The meso- 

 pleura has some short bristles, and one very long and conspicuous one 

 high up on the posterior margin, which is sometimes duplicated. 

 Represented by a large number of specimens in the collection from 

 the District of Columbia; Mount Washington, New Hampshire ; Rock 

 Ledge, Florida; and Twining City, Maryland. Bred from spiders' 

 eggs. 



APHI0CH.S;TA HALICTORUM Melander and Brues. 



I have not seen this species, but it is evidently quite a distinct 

 species judging from the description given by Brues. It is the only 

 black species in the group. Allied to fasciata Fallen, and longifrons 

 Brues, in neuration; it is separated by color characters and also by its 

 having four scutellar bristles. The costa reaches nearly to the middle 

 of the wing, but the first division is only a little longer than the 

 second and not longer than the second and third together. 



APmOCH.STA BARBERI, new species. 



Plate 36, fig. 7. 



Allied to the above, but larger and with several characters by which 

 it may be easily separated from it. Description: Brownish-black; 

 frons black, both pairs of post-antennal bristles very strong, the upper 

 pair more widely placed than the central pair in front of ocelli, 

 oceUi raised, frontal suture distinct, antennse moderately large, 

 brown, arista long, nearly bare, palpi clear yellow, large, and 

 strongly bristled (5-6); thorax brown, postalar celli and humeri 

 yellow, mesopleursB bare, one pair of dorso-central bristles, four 

 equaUy strong scutellar bristles; abdomen brownish black, hind 

 margins of segments narrowly yellow, second segment lengthened, 

 laterally dilated at middle, and with a group of bristles (5-6) on the 

 projecting part; legs and coxae yellow, the apex of hind femora 

 broadly brown, hind tibia and tarsi dusky, mid tibia with a row of 

 serial, rather short but' strong bristles on the dorsal surfaces for two- 

 thirds of their length, apical third of anterior surface clothed with 



