304 NEUROPTERA. 
The folowing figures exhibit the only geographical differences which I have found in this sex :— 
Altamira (53). |Los Amates (3 $).| Casiguana (10 ). | Matto Grosso (5). 
Abdomen .......... 0.00 eens Ne ceeees 28:5-29 26-27 25°5-27 25°5-28 mm. 
Hind wing ............. we eeeeeeeee 30-33 29-30 29-31 30-30°5_,, 
Antecubitals, front wing .............. 12-14 (12) 12 11-12 (12) 11-12(12) ,, 
” hind wing .............. 9-10 (9) 8-10 (9) 8-9 (8) 8-9(9) 
The figures in parentheses in the lines for antecubitals indicate the number occurring most frequently. 
Q. No female among the present material passes beyond the stage of coloration numbered 2 above for the 
males. 
Hab. Mexico, Altamira in Tamaulipas (Hoag, colls. A. N. S., P. P. C.: 5 3), Atoyac 
in Vera Cruz [1 @ ], Teapa [1 ¢,1 9] (H. H. Smith) and Frontera (coll. Westcott : 
1 g,1 2) in Tabasco; Guatemata, Los Amates (Williamson, coll. ejusd.: 2 3,1 23 
Hine, O. S. U.: 1 3); Honpvuras, San Pedro Sula (coll. Williamson: 1 3); Panama, 
La Chorrera (Dolby-Tyler®).—CotomBia, Bonda in Dept. Magdalena (H. H. Smith, 
Carn. Mus. Pittsb.: 13), Cerco’, Bodega del Carmen’, Sitio Carcajal’, Santander 7, 
Sta. Fé de Bogota [Lindig }°, 1863]; Vunezueta [Appun: 1 3 |; Gutana 8, Surinam 9 
[Lhorey: 12] (M. C. Z.), Georgetown (A. M. N. H.: 83,32]; Ecuapor, Casiguana 
[13 3,4 ¢), El Salado [1 ¢, 2 2], Duran [1 3,3 2] (Campos R., A. N.S.); Perv?; 
Brazii °, Macapa 4, Paranda de Buyassu 4, Santarem 4, Manaos47, Cuyaba [3 6,1 2], 
Cachoeira [1 3, 1 2], and Uacarizal [1 ¢, 12] in Matto Grosso (H. H. Smith, 
Carn. Mus. Pittsb.), Santa Anna do Japara (Moenkhaus, coll. Adams: 19), Rio 
Grande do Sul (v. Jhering, coll. P. P. C.: 26, 39); Paraguay, Rio Paraguay 
-below Concepcion (H. H. Smith, Carn. Mus. Pitisb.: 2 3, 12), Sapucay (Foster, 
U. S. N. M.: 2 2); Arouytina, Corrientes! (Perren, coll. P. P. C. ex coll. 
McLachlan: 2 3); West Inpigs, Jamaica 6, 
Taken in February (Teapa, Los Amates, El Salado, Macapdé 4, Manaos 4, Uacarizal, 
Sapucay), in April (Atoyac), May (Casiguana), June (Altamira, Colombia’), July 
(Frontera), August (Altamira, Santa Anna do Japara), October (Bonda), and December 
-(Sapucay, Rio Paraguay). 
The resemblance between this species and Platyplax sanguiniventris has been 
mentioned on page 328. 
3. Erythemis mithroides. 
Mesothemis mithroides, Brauer, Berl. ent. Zeitschr. xlv. p. 266 (1900); Prinzessin Therese, ibid. 
p. 262, t. 3. fig. 5 (¢ coloured), p. 261, fig. 1 (profile of body) (1900) ?. 
Lrythemis bicolor, Hagen, Syn. Neur. N. Amer. p. 169 (1861) * (Chaco 9 only). 
3. The three males before me show the following differences from the description’: no violet reflection on 
the (red) frons, margin of labrum hardly darker ; legs reddish, tarsi, anterior surfaces of femora especially 
near the apices, external (superior) surfaces of tibiee, blackish ; inferior appendage reaching as far as the 
last denticle of the superiors, abdomen and appendages bright red; front wings with 13-15 ante-, 9-11 
postcubitals ; hind wings with 10 ante-, 9-13 postcubitals, the basal brown spot reaching hardly more 
than half-way to the first antecubital in one male from Concepcion, to a little beyond the first antecubital 
