286 Transactions. — Zoology. 



surface. Wings with a yellowish tinge, especially near the 

 costal margin and close to the veins ; surface rather thickly 

 covered with black hairs. Veins brown, with a central row 

 of black hairs ; auxiliary vein ending in costa at about one- 

 quarter the length of the wing ; first longitudinal joining 

 costa at about two-thirds length of the wing ; second longi- 

 tudinal joining costa some distance before apex ; costa con- 

 tinued beyond this point, but not nearly reaching the apex; 

 subcostal vein situated just before marginal cell, latter very 

 short, almost triangular ; petiole of third longitudinal not 

 long; fourth longitudinal not forked. 



I have three specimens of this insect, two of which were 

 taken at Lincoln in February, and the other in Christchurch 

 in June. 



x\ male specimen has almost identical measurement with 

 the female, but it has black forceps. The legs are very much 

 lighter in colour than those of the female, more especially the 

 tarsi and tibise ; the spurs are light-yellow. The veins of the 

 wing are light straw-colour instead of brown. 



Genus Tetragoneura, Winn. 



Costal vein extending far beyond the tip of the second 

 longitudinal vein, but not reaching the apex of the wing ; 

 auxiliary vein small, bent posteriorly, ending in the first 

 longitudinal vein far beyond the n:iarginal cell, or shortened to 

 a tootli ; the marginal cell far beyond the middle of the first 

 longitudinal vein ; inner marginal cell much lengthened ; fork 

 of the third longitudinal vein with a moderately-long petiole ; 

 base of the second posterior cell lying before the base of the 

 third submarginal cell. Surface of the wing microscopically 

 pubescent. 



The above short diagnosis is the only reliable one to which 

 I have access at present. I hesitate to add other characters, 

 fearing that my species is not sufficiently typical. 



Tetragoneura nigra, n. sp. Plate XIII., figs. 10, 11. 



Length of antennae, 0'044 ; size of body, 0-077 X 0-014 ; 

 expanse of wing, 0-077 x 0-083. 



Antennae about as long as the body ; joints of scapus 

 pale -yellow, cyathiform ; joints of flagellum barrel - shaped, 

 but situated on pedicels ; length slightly greater than their 

 diameter, the first three pale-yellow, those nearer the end of 

 the antennae ; all the joints covered with soft hairs with silvery 

 reflections. Vertex black, with a few black hairs. Thorax 

 dull-black, a median and two V-shaped lateral marks rather 

 more intense in shade ; surface covered with short black 

 hairs, and the margins with strong thick black hairs incurving 

 over the thorax. Scutellum black, with two long black hairs 



