164 NEUROPTERA. 
Prothorax pale green, dorsum of middle lobe brown, with a pair of small median green spots. 
Thorax pale green, with the following dark brown: anterior mesothoracic margin; a right and a left 
submedian stripe contiguous to the mid-dorsal carina, abruptly narrowed below, where they are barely 
confluent with the marginal brown, reaching the antealar sinus above and narrowly connected along it 
with the brown humeral stripe; an antehumeral and a humeral stripe confluent above and below and 
only separated for the middle of their length by a pale line, the antehumeral not reaching the antealar 
sinus above; a stripe on the (obsolete) first and on the second lateral sutures, the former widening near 
its lower end to reach the metastigma, and fusing, or tending to fuse, near its upper end, with the 
second lateral sutural stripe ; a stripe near the posterior margin of the metepimeron, fusing with the 
stripe in front behind the base of the third legs. The pale areas between the submedian and ante- 
humeral brown stripes widen from above downward and at mid-height are subequal in width to the 
brown antehumeral, those between the brown stripes on the sides of the thorax subequal to them in 
width. 
Abdomen dark brown or blackish, with the following pale green or yellow: most of segment 1, a mid-dorsal 
longitudinal stripe, auricles, and sides inferiorly of 2; a mid-dorsal stripe on 3-6 reaching from the base 
of each backward, to seven-eighths length on 3, four-fifths on 4, half on 5 and 6; basal fourth to fifth 
on each side inferiorly of 3—6, basal three-fifths of 7. The sides of segments 8 and 9 and much of 10 
have a reddish tinge. 
Superior appendages yellow in the basal half, darker in the apical half; inferior appendage still darker (for 
the shape, &c., see figures and page 160). 
Wings clear, with some pale yellow at the extreme base, costa with a yellow line anteriorly, at least to the 
nodus; pterostigma dark reddish-brown between black veins, surmounting 43-6 cells, costal edge on 
front wings 3-3°75 mm. long. Front wings: 15-17 antenodals, 12-13 postnodals, two post-triangular 
rows increasing to three at the level of the nodus or slightly beyond. Hind wings: 11-13 antenodals, 
12-14 postnodals, three post-triangular cells, then two rows increasing a short distance proximal to the 
level of the nodus. 
Femora greenish, dark brown superiorly for the whole length on 1, for the distal half on 2 and 3; tibie and 
tarsi black. 
Dimensions.— (See p. 160.) 
2 unknown. 
Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith: 2 3). 
These two males, taken in May, are remarkable for their appendages, the superiors 
and the two branches of the inferior having each a well-marked superior tooth, directed 
posteriorly in the former, anteriorly in the latter. The teeth on the inferior appendages 
recall those of the European Onychogomphus uncatus. 
5. Erpetogomphus cophias. (Tab. VII. figg. 28, 33, 45.) 
Erpetogomphus cophias, Selys, Monogr. Gomph. pp. 72, 481, t. 4. figg. 6 a—-d (details ¢) (1858) '; 
Bull. Acad. Belg. (2) vii. p. 537 [11] (1859) ?*; 1. c. (2) xxviii. p. 175 [12] (1869) °. 
Gomphus cophias, Hagen, Syn. Neur. N. Am. p. 100 (1861) *. 
¢. The markings on abdominal segments 8 and 9 vary from those described! for the single male type to the 
entire dorsum of those two segments black with a pair of minute basal pale spots on 8, sides of 8 and 9 
' yellow inferiorly, but the extreme lateral margins black ; pterostigma surmounting 33-5 cells. 
Hab. Mexico (Sallé, Mus. Paris'?), Trojes del Oro (Saussure 34), Cuernavaca 
(H. H. Smith: 4 3; Barrett, coll. P. P.C.: 1 2; coll. Deam: 2 2 ), Omilteme in 
Guerrero (Hl. H. Smith: 1 @ ). 
Taken at the last two localities in June and July. 
