710 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvii. 



Mental sete about 12 each side, the fifth (counting' from the side) 

 longest. Lateral lobes large, broadl}^ concave. Lateral sette 8; hook 

 slender, setiform; teeth minute, almost obsolete, unispinulose. 



Legs rather thinly clad with hairs. The basal segment of the tarsus 

 is longer than half the length of the second or third segments. The 

 wing cases reach posteriorly as far as the apex of the sixth abdomi- 

 nal segment. 



Abdomen triquetral, sharp edged; in outline, oval. Dorsal hooks 

 wanting. Lateral spines on segments 8 and 9, terminating very strongly 

 spinulose; lateral margins on these segments about a fourth as long as 

 the segments that bear them, straight and sharp. Segment 9 slightly 

 concave above on the apical margin; 10 one-half shorter dorsally, one- 

 third shorter ventrally, than 9. Appendages as long as the last two 

 segments are on the dorsal side; superior and inferiors stout, with 

 thin, divaricate tips and spinous margins; laterals one-fourth shorter 

 than the others. 



Color greenish, suffused with brownish dorsall}", the brown divided 

 on thorax and abdomen b}^ a narrow middorsal pale line that is most 

 sharply marked behind. There is a row of dots either side of the 

 dorsum of the abdomen extending from the hind wing to the base of 

 the lateral appendage, a pair of dots to each segment. There is a 

 divided brownish spot on the dorsum of the prothorax and another on 

 the mesothorax, and there are the usual bare scars on the rear of the 

 head. 



MICRATHYRIA PALLIDA, new species. 



Length, male, 29 mm., abdomen 20 mm., hind wing 22 mm.; female, 

 length 25 mm., abdomen 17 mm., hind wing 21 mm. 



Color pale, fulvous; face greenish yellow, top of frons and vertical 

 tubercle washed with chalybeous. Thorax nearly 

 uniform fulvous, without stripes, with black dots 

 sprinkled over the dorsum and narrow black lines 

 'on some of the corinae about the wing roots. Legs 

 yellowish fulvous, apical part of femora externally 

 and all of tibise internally, and the tarsi blackish. 

 AVings hyaline, slightly flavescent at extreme base; 

 veins fuscous; stigma pale, fulvous. Abdomen 



Fig. 4. — End of abdo- , • i c i i i ^ n i 



MEx OF NYMPH OF Ml- browuisfi lulvous, darker toward apex b}' reason 

 cRATHYRiA PALLIDA q^ confluencc of fuscous tracts along the dorsal and 

 lateral carina^. Appendages yellow. Sides of ab- 

 domen little narrower beyond basal segments, regularly approximating 

 posteriorly. Appendages as shown in figs. 5 and 6. 



Venation of wings very similar in the two sexes. Ante- and post- 

 nodals in fore wing 11 and 7 respectively, in hind wing 8 and 8 

 respectively. There are 2 cross veins behind the stigma. There 

 are 3 cells in the subtriangle of the fore wing; there is one crossvein 



