168 NEUROPTERA. 
12. Erpetogomphus menetriesi ? 
Gomphus menetriesii, Selys, Rev. Odon. Eur. p. 102 (1850) ’. 
Ophiogomphus (?) menetriesii, Selys, Bull, Acad. Belg. xxi. pt. 2, p. 39 [20] (1854) *. 
? Herpetogomphus menetriesii, Selys, 1. c. (2) xlvi. p. 429 [24] (1878) °. 
Erpetogomphus crotalinus, Selys, Monogr. Gomph. p. 75 (1858) (in part.) - 
Hab. Guatemata (Mus. Paris & coll. Selys *).—t Braz (Mus. St. Petersb.1? 4), 
The type was a male whose appendages were lacking; its description!?* is very 
brief and affords no certainty of identification. Ina second pair, from Guatemala, 
which furnished the basis of the description of 18783, the last four abdominal segments 
of the male were lost. In view of the absence of these parts, of the practical certainty 
that the Guatemalan male was never compared with the type*, and of the circumstance 
that a “Brazilian” female described in 18584 is stated to have the “tibias noirs 
bilignés de jaune en dehors,” abdominal segment 9 “noir en dessus avec une tache 
dorsale ronde touchant le bord postérieur,” while the Guatemalan pair have the tibie 
“ noirdtres ” and in the female ‘“‘les quatre derniers segments paraissent jaunatres sans 
taches”°, it is open to question whether the Guatemalan examples be really menetriesi 
or not. It is also worthy of note that the Brazilian pair were doubtfully referred to 
crotalinus in 1858, while the Guatemalan individuals were compared to designatus and 
compositus *. 
Of the Brazilian locality of menetriesit type, Selys wrote in 18782 that it “serait 
alors le résultat trés-probable d’une erreur d’étiquette, car on n’a encore trouvé aucune 
espéce de ce groupe dans l’Amérique méridionale.” 
*CYANOGOMPHUS. 
Cyanogomphus, Selys, Bull. Acad. Belg. (2) xxxv. p. 753 [26] (1873) '; Ann. Soe. Ent. Belg. xxxviii. 
p. 178 (1894) ° 
To the characters of this genus, as given on page 147, may be added that the hind 
wings have three rows of cells in the widest part of the area between the second sector 
of the triangle and the hind margin. Owing to the brevity of the existing descrip- 
tions! 2, I am not sure that the following species is correctly referred to Cyanogomphus. 
The two known species, from Demerara and Brazil, are said to have the sectors of the 
arculus well separated at their origin, and the discoidal triangle of the hind wings 
almost equilateral. 
* Hagen has this remark under Gomphus crotalinus (Syn. Neur. N. Am. p. 101): “ G. menetriesi, from 
Brazil, very likely, does not differ from this species ; but the typical specimen being destroyed, other specimens 
are. to be observed.” 
