8 NEUROPTERA. 
3. Thraulus mexicanus. 
Thraulus mexicanus, Eaton, Rev. Mon. Ephem. p. 109, t. 18. fig. 23** (details) (1884) (Calliarcys 
mexicanus in the writing of the plate cited) ’. 
Imago (dried).— g described and illustrated (hind wing and genitalia) in the work cited. 
Q. Femora banded. Costal elbow nearly opposite the middle of the hind wing ; subcosta slightly curved, 
produced past the cross-veinlet from that elbow to the margin below the elbow ; stem of the radius directly 
continuous with the two cross-veinlets extending in a curved line from it to the costal elbow (the figure 
cited, fig. 23**, needs perfecting hereabouts—the subcosta and radius should not be represented as 
attenuated before their intersection with the cross-veinlets, but only beyond that). Ventral lobe of the 
ninth abdominal segment obtusely rounded and entire. 
Thorax raw umber-brown. Abdomen pitch-brown, opaque at the joinings. Fore femur pitch-brown; tibia 
impure whitish, with the base and a broad band just before the extreme tip pitch-black ; tarsus black, 
except the whitish first two joints and the joinings; ungues pitch-brown. Intermediate femur pitch- 
brown, with the extreme base and the tip and a narrow band before the middle whitish; hind femur 
rather whiter in the basal half. Hinder coxe and trochanters whitish; tibie whitish, with the 
extreme tip black ; tarsi whitish, with the last joint and the bases of the intermediate joints blackish. 
Wings vitreous, with a pitch-brown stain at the great cross-vein and at the bases of the main nervures 
enclosing a clear space at the extreme roots; neuration (over white paper) indistinct to the naked eye and 
pale, shifting in oblique view to light brownish. Cross-veinlets fairly numerous in the disk of the fore 
wing, arranged in about eight irregular transverse series reckoning along the sector from its junction with 
the cubitus, but scarce towards the hind margin: none before the bulla, but nine beyond that in the 
marginal area, all simple. 
Length of wing, 2, 8 millim. 
Hab. Mexico (Mus. Brussels; 3 imag.'); Panama, Bugaba 1000 feet (Champion ; 
one @ imag.). 
4. Thraulus lepidus. 
Thraulus lepidus, Eaton, Rev. Mon. Ephem. p. 109 (1884) *. 
Subimago (?) (dried).— Wings light sepia-grey, with piceous neuration. 
Imago (dried)—Femora banded. Hind wing as in Th. mewicanus, the subcosta and radius being attenuated 
beyond the cross-veinlets that connect the latter with the costal elbow; radius met by three nervures (of 
which the first and third are forked, and each enclose within the fork an isolated veinlet arising from the 
margin) and followed by two simple nervures. Ventral lobe of the ninth 2 abdominal segment narrowed 
posteriorly and emarginate. 
do. Described in op. cit. The original description may be enlarged or modified in the following particulars :— 
Thorax varied behind with whitish-ochre, and with a blackish stripe along the pleura. Fore femur and 
tibia rufo-piceous; the former with a black streak from the base to a little beyond the middle, the tibia 
blackish at the tip ; the third and fourth joints of the tarsus only from some standpoints of a darker colour 
than the remainder. Hind femur with a pale band just beyond the middle. Fore wing strongly tinted 
in the submarginal area (excepting for a short space just beyond the bulla) with rich brownish-yellow 
amber-colour ; the area at the wing-roots and the ends of the nervures in proximity thereto, like the sub- 
costal edge of the marginal area as far as the bulla, clouded with light raw umber. Great cross-vein 
piceous posteriorly, but pale towards the costa. Neuration (over white paper) distinct to the naked eye ; 
cross-veinlets fairly numerous in the fore wing, arranged in about eight irregular transverse series, 
reckoning along the sector from its junction with the cubitus; those in the marginal area before the bulla 
well defined. , 
@. The colouring of the submarginal area of the fore wing hardly extends halfway from the great cross-vein 
towards the bulla, where again it occupies a short space or forms a small spot; between this and the base 
of the wing the cross-veinlets in both of the adjacent areas are clouded with the same colouring more 
distinctly than any of those in the other parts of the wing. In the marginal area are four or five well-defined 
