OCR Text |
Show 1889.] MR. W. F. KIRBY ON NEW ODONATA. 299 Genus PSEUDOGOMPHUS. Male. Eyes contiguous, frontal tubercle slightly bifid; labium cleft. Wings long and rather pointed, triangles rather small, free, those on the hind wings rather longer than those on the fore wings : fore wings with 6-8 cross-nervures in the lower basal cell, and four supratriangular nervures : hind wings with 2 or 3 supratriangular nervures, and 5 in the lower basal cell; membranule rather large; inner margin concave between this and the anal angle. Abdomen with the appendages of the second segment large, upper anal appendages about as long as the lower, which is broad and truncated ; at their base rises a strong vertical conical spine, pointed at the apex. Probably allied to Cordulegaster, but very distinct from any described genus. PSEUDOGOMPHUS INSIGNIS. Expl. al. 94 millim. ; long. corp. 83 millim. Male. Dark brown, tinged with reddish, especially on the face and pleura ; vertex punctured, shining with green and violet; thorax green above and on the sides in certain lights ; third segment of the abdomen yellow. Wings yellowish hyaline, darkest at the edges ; pterostigma black, covering rather less than 3 cells ; fore wings with 16-18 antenodal and 10-12 postnodal nervures; triangles and subtriangular space free. LLab. Cameroons. ANAX STRIATUS. Exp. al. 105 millim. ; lat. al. ant. 12 millim.; lat. al. post. 17 millim. ; long. pter. 3 millim.; long. corp. 75 millim. Testaceous yellow ; head with the front raised, rugosely-punc-tate, and marked with a blackish spot on the summit; the region of the ocelli, the lower edge of the nasus, and all the mouth-parts reddish brown, more or less varied with yellow at the sutures. On the thorax the septa are very strongly ridged, and are marked with black in front and within ; there are also four black spots on the depressions of the pleura ; legs reddish. Abdomen with the first and second segments much swollen, the hinder half of the second segment with black markings diverging on each side of the carina; the following segments with two blackish spots at the base, two smaller ones beyond the middle, and an irregular blackish stripe crossing the carina before the extremity; the incisions are also marked with black in the middle; on the 7th and 8th segments these marks become more suffused and irregular, and are not continued further. Wings very broad, clear hyaline, the space between the costal and subcostal nervures filled up with smoky yellow, very dark at the base, and ceasing, like the costal nervure, at the nodus; the lower basal cell is also stained with yellow as far as the lower triangle; pterostigma brown, very short. Fore wings with 20-21 antenodal |