ORTHOLEXIS; KATREUS. By Dr. C. Aurivillius. 
583 
* C. boadicea Hew. (76 b) is similar to C. atratus (76 a), but at once discernible by the very large and boadicea. 
long yellow spot in 1 b of the forewing. The $ is unknown to me. Cameroon to Gabun. 
C. chrysoglossa Mab. (76 b) cannot be mistaken for any other species. Cameroon. chrysoglos- 
C. illustris Mab. (76 b) numbers among the largest and most beautiful species of the genus and is uiuslris. * 
particularly distinguished by the great width of the yellow median transverse band of the forewing; in the $ 
the band, however, is narrower than in the d- Cameroon to Ogowe Valley. 
C. beni B.-Bak. is unknown to me and could not be inserted in the review of the species according herd. 
to the description, because it does not show for certain, whether the species belongs to the division 1 or II. 
-— Both wings black, more or less strewn with orange-brown scales. Forewing with a bright yellow, trans¬ 
parent, very irregular median transverse band from the costal margin over the distal half of the cell almost 
to the anal angle, behind vein 2 deeply indented by the ground-colour; a subapical spot composed of three 
dots; a small submarginal double dot across vein 5; a wedge-shaped spot more towards the base in 3. Hind¬ 
wing at the costal margin as far as vein 7 black, otherwise light orange-brown with an orange subapical band, 
which also enters into the dark costal margin and is continued along the margin as a row of spots; an orange 
transverse line at the cell-end. Under surface smoky-brown; forewing with all the hyaline spots of the upper 
surface; hindwing faintly suffused with yellowish-brown, with a yellow spot in the cell which is closed by 
a yellowish patch. Fringes orange, at the veins interrupted. In some specimens the forewing beneath also 
shows a postdiscal row of yellow spots almost parallel to the margin.“ — ,,The $ is similar to the cL but 
darker, and on the hindwing with a series of 4 submarginal spots between the veins 4 to 7.“ Expanse 44 
(d 1 ) to 54 ($) mm. Congo District: Makala-Beni. 
12. Genus: Ortholexis Karsch. 
Antennal club with a long point, semicircularly bent. Last palpal joint small and short. Cell of fore- 
wing projecting little beyond the centre of the forewing; vein 2 arises before the centre of the cell, 5 nearer 
6 than 4, 11 separate. Hindwing rounded off; vein 2 far behind the centre of the cell; terminal vein of the 
cell very much curved towards the base; vein 5 feeble and indistinct. Hind tibiae with 4 spurs, in the B very 
long haired. 
0. melichroptera Karsch. Both wings above and beneath monotonously blackish-brown, without any melichro- 
other markings but a slanting, semi-transparent, yellow transverse band of the forewing, beginning at the 
costal margin somewhat behind the centre and ending at vein 2; it is situate entirely beyond the discal cell, 
but it completely or almost completely fills up the base of the areas 5 to 9; its spot in 2 is triangular and 
with its apex reaches to vein 2; in the this band is broader in the centre, distally rounded off and in the 
area 1 b about 3 mm distant from the margin, in the $ it is almost equally broad and in 1 b scarcely more 
than 1 mm distant from the margin. Palpi yellow, beneath with a greyish-brown longitudinal stripe. Ex¬ 
panse 43 (d) to 53 mm. Cameroon. 
0. hollandi H.-Drc. (= johnstoni Holl.) is smaller (about 36 mm) and differs from the $ of 0. meli- hollandi. 
chroptera in the light transverse band of the forewing being quite narrow, whitish and much shorter, only 
reaching vein 4. $ unknown to me. Cameroon and Congo District. 
Appendix. 
I append here the following genera which I was unable to examine and the position of which amongst 
the Hesperids is doubtful. 
Genus: Katreus Watson. 
(= Choristoneura Mab.; Loxolexis Karsch). 
Antennae long, longer than half the costal margin of the forewing; club long and thin. Terminal joint 
of palpus entirely hidden. Wings broad. Discal cell of forewing very long, as long as two thirds of the costal 
margin, with an elongately extended apex and a curved terminal vein: vein 2 far before the centre of the cell, 
5 straight, but nearer 4 than 6, 11 separate. Hindwing broad rounded off: vein 2 almost from the centre of 
the cell; 5 very delicate, indistinct, terminal vein almost straight. Hind tibiae with 4 spurs, beneath densely 
spined; in the B with a long hair-pencil. 
K. johnstoni Butl. (= apicalis Mob.; percnoptera Karsch) (76 b, as apicalis) in its size, colouring and johnstoni. 
marking is very similar to Ortholexis melichroptera Karsch and differs beside the generic marks only in the 
