80 



DIPTEEA. 



1. Conops discalis ? sp. n„ 6 2 . 



Male. Antenme black, or dark reddish-brown ; first joint about one-half, the third joint abont two-thirds, the 

 length of the second ; style slender at its tip. Face blackish, in the depression yellowish, on the orbits 

 yeUowish- or white-glisteniug-pollinose. Front black, somewhat shiniDg. Proboscis not twice the length 

 of the head. Thorax black, a little shining ; a. yellowish-pollinose spot on the inner side of each liumerus. 

 Pleura; lightly poUinose, without distinct vertical pollinose stripe. Abdomen black, the third segment 

 yellow at its base ; third and fourth segments each with a narrow yellow- or yeUowish-poUinose, opaque 

 hind margin ; the fifth and sixth segments, for the greater part, light yeUow-poUinose. Legs dark brown 

 or black, the base of all the tibise yellow. Wings brown in front of the third longitudinal vein, sub- 

 hyaline behind ; a narrow cloud before the fifth vein. 



Female. Face yellow ; cheeks brown. Pifth abdominal segment with a large process below. 



Length 9-10 miUim. 



Hab. Mexico, Amula and Omilteme in Guerrero, Teapa in Tabasco (H. H. Smith). 



2. Conops anthreas, sp. n., $ 2 . 



Antennse red or dark reddish-brown, the third joint in great part red ; first joint about one-half, the third 

 joint almost two-thirds, the length of the second joint, the latter slender. Face light yellow, on the sides 

 with a silvery or slightly golden sheen, the grooves more or less brownish or blackish at the bottom. 

 Front opaque, nearly blaok ; a more shining space above and below ; the orbital margins, below, narrowly 

 silvery ; the black extends down a little distauce on each side of the autennae. Proboscis nearly black, 

 about twice the length of the head. Thorax dark rcddish-brown, the dorsum nearly black, its posterior 

 margin yeUowish-pollinose ; a golden-pollinose spot at the inner side of each humerus ^ pleural stripes 

 complete and with weU-defined margins above. Abdomen black, the base of the third segment reddish 

 or yeUowish ; third, fourth, and fifth segments each with a narrow, golden, opaque posterior margin j 

 fifth segment golden-pollinose behind. Legs brownish-red or reddish-brown, thc tip of the metatarsi and 

 the following joints black, the base of all the tibise yellow. Wiugs brown in frout of the third lougi- 

 tudinal vein ; the first posterior ceU, save behind the streak corresponding to the spurious vein of the 

 Syrphidaj, and a large semioval space in the outer posterior part, all brown ; a narrow browu streak in 

 front of the fifth vein ; elsewhere the wing is hyaline or subhyaline. 



Length 8-10 millini. 



Hab. Mexico, Presidio de Mazatlan (Forrer), Acapulco ancl Eincon in Guerrero, 

 Atoyac in Vera Cruz (H. H. Smtth). 



Five specimens. This species differs from all the known American members of the 

 genus, save C. brachyrhyuchus and C. discalis, in having the third joint of the antennse 

 distinctly shorter than the second. 



o. Conops sequax, ^p. n., $ . 



Face reddish-yeUow ; orbits with a golden sheen ; cheeks brown. Front black, moderately shining. Antenmo 

 black ; first joint more than half as long as the second ; third joint longer thau the second, graduaUy 

 tapering froin near the base ; style slender, bristle-Uke on the distal half of the third joint, the secoud 

 joint not at aU prominent. Proboscis about twice the length of the head. Thorax black, but Httle 

 shining ; humeri lightly whitish-poUinose above ; pleural stripe iudistinct above. Abdomeu black ; 

 second and third segments with a narrow golden-poUinose band behind ; sixth segmeut for tho most part 

 covered with whitish poUen ; ventral process of the fifth segment very large. Legs dark brown or 

 brownish-black ; base of aU the tibise yeUow ; basal joints of aU the tarsi yeUow or yeUowish. Wings 

 brown in front of the third vein and in the first posterior ceU as far as the streak corresponding to the 

 spurious veiu ui rhe Byrphida; ; iu front of the last section of the fourth vein a Bubhyaline space. 



Length 15 miUim. 



