no. 2089. NOTES ON NEOTROPICAL DRAGON FLIES— WILLIAMSON . 629 



Paratope. — Cat. No. 19217, U.S.N.M. A male from Wismar, British 

 Guiana, January 30, 1912. 



PSAIRONEURA REMISSA Calvert. 



The following captures may be recorded: 



Guatemala: Puerto Barrios, June 23, 1909, in woods along a small 

 stream, only a few feet above sea level, 2 males. Los Amates, June 

 21, 1909, along a small wet-weather stream in woods, 1 male. 



Costa Kica : All collected by Doctor and Mrs. Calvert, Florida Road, 

 west of Guapiles, by side of shady brook in forest, June 3, 1909, 1 

 male. Reventazon Valley, near Juan Vinas, small streams, elevation 

 2,500 feet, June 28, 1909, and April 28 and May 31, 1910, 5 males, 1 

 female. Upper Reservoir, Banana Riu, forest, November 9, 1909, 

 2 males. 



In the Costa Rica material the metepisternum and metepimeron 

 are largely pale; in the Guatemala material both are largely dark, 

 in the extreme the metepisternum entirely black, except a small area 

 about the metastigma, and the metepimeron, except the area imme- 

 diately adjoining the latero-ventral carina. 



Doctor Calvert has kindly given me the following notes on his 

 Costa Rica material: 



Male, eyes bright red in front, yellowish (pale yellow) below, dark brown with some 

 blue reflections above; dorsum of head, thorax, and anterior abdominal segments, 

 dark metallic green ; nasus with blue reflection and a blue spot on each side of ocellar 

 triangle; frons anteriorly, most of clypeus and lips, metapleuron, pectus and inferior 

 lateral margins of 1-8, pale brownish yellow; 9 or 9 and 10 pruinose white, and this 

 area is the only part of the insect that was visible as it "floated " in the gloom of the 

 forest over clay mud about a small water hole. At Juan Vinas along a deeply shaded 

 rivulet, near to and west of Rio Naranjo, June 28, 1909, 2 males were taken moving 

 over the water's surface, an inch or two above it, hardly visible except for the con- 

 spicuous paler blue ninth abdominal segment (faded after death). Female, eyes 

 greenish-yellow below, dark brown above; much less bluish reflections on nasus, but 

 blue spot present on each side of ocellar triangle; mesepimeron pale brown, meta- 

 pleuron yellow; hind dorsal margin of 6-8 narrowly pale blue. 



PSAIRONEURA CERASINA, new species. 



Length of abdomen, male, 26 mm. ; hind wing, 16.5. 



Head. — Male. Beneath and rear of eyes pale flesh; in front, 

 including the extreme lower edge of the frons, very pale obscure yel- 

 low; labium with a large geminate black spot across its base, and a 

 stripe of black of equal width on the clypeus, these two black areas 

 isolated ; above black with metallic green reflections ; antennae brown. 



Proihorax. — Male. Flesh color with suggestions of red, especially 

 dorsally; the posterior lobe low, convex, and largely occupied 

 medially by an extension of the median dark color of the mesepisterna. 



Thorax. — Male. Dorsum for its entire length with a uniform stripe 

 of metallic blue which covers, on either side, about one-half of the 

 mesepisternnm; on either side of this middorsal stripe, orange or 



