Publ. 18.11. 1937. 
TIRISTA; SINCARA. By B. Zukowsky. 
1257 
— var. montana Hy. Edw. (= tanaceti Hy. Edw.) (180 e) has yellow legs with black bands and more extensive moniana. 
red on the forewing. — var. rubescens Hulst. (180 e) has very extensively red forewings, red-veined hindwings, rubescens. 
the abdominal rings and legs beautifvdly golden yellow. — var. coloradensis Hy. Edw. (= torva Hy. Edw.) colorademis. 
(180 f) is quite black, with occasional traces of red at the inner margin of the forewing. 
A. denotatus Hy. Edw. (180 e). Head and palpi black with inwardly yellow tipas, orbita purely white, denotatus. 
Collar lustrous violettish black intermixed with yellow. Antennae steel-blue above, reddish below. Thorax 
bluish black, behind with a yellow lateral streak and a yellow shoulder-spot. Abdomen deep black, with a bluish 
reflection, the 2nd, 3rd, 4th, and the two last segments with broad yellow bands. Anal tuft black with traces 
of yellow hair. Legs black, middle and hind tibiae partly orange, the last yellow inside. Tarsi orange. Forewing 
violettish black with a transparent streak, all the rest as in P. tricinctus. According to Beutenmuller, denotatus 
may be a variety of tricinctus, since they are very similar, but denotatus has five yellow bands, tricinctus four in 
the <$, three in the $. 26—28 mm. Montana, Colorado, Texas. I could not find out anything about the habits. 
A. beutenmiilleri Skinn. Antennae, head, palpi, thorax, abdomen, and legs black. Abdomen and thorax beutenmiil- 
beneath metallic bluish black. Hindlegs with long black hair. Wings bright red, narrowly margined with black, 
fringes black. Forewing hyaline in the distal area, divided into four parts by the red veins, a hyaline streak 
in the centre of the wing; these hyaline areas are slightly covered with shining greenish or bluish scales, base 
and inner margin blackish. The hindwing has two similar spots, one near the costa, apparently bipartite by a 
vein, and a broader one near the base, tripartite; the base itself blackish. 20 mm. Only 1 $. Stockton, Utah. 
End of May. 
35. Genus: Tirista Wkr. 
Proboscis absent. Palpi erect, not quite reaching the head, densely scaled. Antennae strong, pectinated, 
growing weaker apically. Abdomen fusiform, twice as long as the thorax. Legs short, hairy, hind tibiae with 
four long spines. Wings narrow, veins of the usual structure. Forewing scaled, hindwing scaled in the apical 
half, the rest transparent. Very closely allied to Melittia, Alonina from Africa and Parantdirene. 
T. argentifrons Wkr. <$: black, face silvery, its posterior edge with dingy yellow fringes. Palpi reddish, argentifrons. 
yellowish apically. Chest with yellow streaks on each side. A yellow cartilaginous elevation at the base of the 
forewing. Abdomen red, the 2nd segment with a yellow band, the 5th, 6th and 7th quite yellow. Anal tuft 
yellow with a few black hairs. Legs red, tarsi golden yellow, femora black, hind tibiae beneath marked black. 
Forewing purple black. Hindwing transparent, bright red at the base, apical half and inner margin black. 
30 mm. Oaxaca in Mexico. 
T. praxila Drc. (185 c). All the wings semihyaline, yellowish brown, forewing with a darker costal praxila. 
margin and centre. On the hindwing the costal margin, apex and distal margins are edged with yellowish brown; 
both wings with pale yellowish brown fringes. Antennae, palpi, and legs yellowish brown. Head, thorax and 
abdomen darker brown, anal tuft yellow. 45 mm. Mexico: Jalapa. 
36. Genus: Siiicara Wlcr. 
Body rather strong. Head broad, proboscis absent. Palpi erect, thickly haired below, 3rd joint short, 
conical. Antennae filiform, plain, as long as the thorax. Abdomen fusiform with a small pointed anal tuft, 
somewhat longer than the thorax, the first segment compressed. Legs rather long and strong, the anterior tibiae 
with a long hair-tuft. Wings narrow, the 2nd interior vein twice as distant from the 3rd as from the 1st; 3 
nearer to 2 than to 4. The 2nd upper vein bifurcates after % of its length. 
S. crassicornis Wkr. $: blackish purple, of a strong structure. Proboscis quite short. Robust club- crassicornis. 
shaped antennae slightly falciform. Abdomen fusiform, twice as long as the thorax. The two last segments 
and the under surface ash-grey, with a slight yellowish reflection. Legs thick, hind tibiae hairy, hind tarsi 
yellowish ash-grey towards joints. Forewing deep purple, distal margin rounded. Hinclwing transparent, veins, 
margins, and fringes purple. 26—28 mm. Ega (Teffe). 
S. eumeniformis Wkr. dark rust-coloured with a few silvery scales on the head and prothorax. Head eumenifor- 
blackish. Palpi with scaly hairs at the base. Antennae bluish black. Abdomen reddish, the 1st segment brown, mis 
whitish behind. Legs blackish, with scaly stripes below, spurs light grey. Forewing delicately brown, semi¬ 
transparent. Hindwing transparent. 30 mm. Para. 
S. manoba Drc. (185 d). Forewing brownish black, darkest along the costa. Hindwing yellowdsh hyaline, manoba. 
fringe black. Head thorax, and abdomen dull black. Antennae black. 25 mm. Mexico: Teapa, Tabasco, 
February. 
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