DIPTERA. 



239 



narrow posterior band on each segment, narrowly interrupted or subinterrupted, yellow; in addition, 

 there is a transverse yellow spot on the anterior part of the first segment. Legs brownish or reddish- 

 yellow ; the front and middle tarsi browner, the hind tarsi yellow ; hind metatarsi at the distal end with 

 a prominence below. Wings nearly hyaline, expanded distally as in Ehaphiocera ; the second vein forks 

 before the anterior cross-vein. Length 7 millim. 



Hab. Mexico, N. Yucatan (Gaumer). 



Two specimens. This species bears a strong resemblance to Rhaphiocera {Hoplistes) 

 hortulanus, Macq., as well as to Campeprosopa longicomis, described below. It has, 

 furthermore, the Rhaphiocera-like expansion of the wing mentioned by Loew in his 

 definition of the genus, and, curiously enough, there is a swelling on the underside 

 of the distal portion of the hind metatarsi, similar to that described by Osten 

 Sacken in R. pampinus (antea, p. 26). 



CAMPEPROSOPA. 



Campeprosopa, Macquart, Dipt. Exot., Suppl. iii. p. 46 (1850). 



The type of this genus is from Java, while an additional species has been described 

 from Sumatra by Osten Sacken. According to Brauer, Campeprosopa has eight closely 

 united annuli in the third antennal joint, terminating in a minute style. The Mexican 

 insect here referred to it has but seven joints and no style whatever, apart from the 

 thickened terminal joint, which may in itself represent the style. Brauer is inclined 

 to place the genus among the Hermetiinee, rather than the Sarginae, on account of the 

 variability of the neuration. Both Analcocerus and Campeprosopa, as here understood, 

 clearly belong to the Sarginae, notwithstanding the entire absence of the arista. 



1. Campeprosopa longicornis, sp. n. (Tab. IV. fig. 11, $ .) 



§ . Antennas arising from a conical protuberance, which is situated near the middle of the head (when viewed 

 in profile), black, with black hair ; first joint more than twice the length of the second ; third joint much 

 elongated, its length greater than the width of the head, composed of seven closely united annuli, the 

 first four'anuuli nearly square, fifth and sixth distinctly narrower and longer ; beginning with the third, 

 the joints are flattened and grooved on the underside, in the seventh forming a spout-like body with 

 everted margins ; seventh annulus style-like, though nearly as thick as the preceding, in length equal to 

 more than half of the entire third joint, not hairy, ending in a blunt point, wholly without terminal 

 bristle. Front nearly as in Ehaphiocera armata, save that the lower part is more prominent; shining 

 black, below the transverse groove with two subconfluent yellow spots, below which the space at the root 

 of the antennas is deep brown ; above the groove, near the middle, there are two small yellow spots ; the 

 black exteuds from the ocelli between the oblique grooves to the occiput ; on the outer side of the 

 grooves the broad posterior orbits are light yellow, save for a small dark brown spot. Face much 

 receding, dark brown, with two partially confluent spots near the root of the antennas ; cheeks black. 

 Mesonotum finely punctulate, opaque black, with two yellow stripes turning out at the humeri to connect 

 with the broader yellow lateral margins in front of the root of the wing ; from the green post-alar callus 

 a small triangular yellow spot, directed forwards. Scutellum green, black in the middle ; the margin 

 with two slender yellow spines. Pleurse black and light yellow. Abdomen black, punctulate ; the 

 narrow lateral margins, and a narrow, posterior, interrupted band on the margin of each segment, green. 

 Legs yellowish-red, the basal half of all the femora and a ring on the middle of each tibia light yellow ; 

 front tarsi black, the terminal joints yellowish ; middle tarsi brown or brownish-black, with the terminal 



