70 ENTOMOLOGICAL NEWS. [March, 



Neb., have it almost straight in either lateral third, convex in the middle 

 third ; in i ? similar, but the middle convexity with a slight but distinct 

 median emargination, Fig. 10 ; forming three slight convexities in its three- 

 thirds respectively i 9 ; slightly convex as a whole but with a distinct me- 

 dian notch i 9 Tex. ; almost straight i ? . In 3 9 crassns, slightly convex 

 in either lateral fourth, concave in the middle two-fourths, Fig. n. 



19. 9- JSasal mid-dorsal yellon' spot on eighth abdominal segment. 

 One-third as long as the segment in S 9 fraternus (one-fourth in 3 9 , 

 one-sixth i 9, two-fifths 5 9 total 53 '/,). Two-thirds as long as the 

 segment 2 9 e.vternus, one-half 2 9 IH., Tex., two-fifths 2 9, 111., Neb. 

 Two-fifths as long as the segment 2 9 crassus, one-half i 9 



20. cf'. Sasa/ mid-dorsal yellou- spot on eighth abdominal segment. 

 One-third as long as the segment in 8 fraternus (one-fourth in 8 {, 

 two-fifths in 3 r? total 57 % ) ; one-half as long in 4 ^ c.vternus ; one- 

 third as long in 15 o 7 ' crassns (two-fifths in 3 -f 1 , one-half in i <j\ one- 

 quarter in i ^ total 25 'r ). 



21. 9. Apical lateral yellow on seventh abdominal segment. Absent 

 in 6 9 fraternus (very small in 6 9 , distinct in 5 9 total 65 '/ ) ; present 

 in 6 9 c.vtcrnus ; small but present in 3 9 crassns. 



Finally, to record some other observations made at the same time, it 

 may be stated that very little difference was found in the shape of the 

 hind margin of the occiput in the males of these three species, as it is 

 convex in all three, the degree of convexity varying slightly, or a slight 

 flattening being observable in the middle. The coloring of the hind lobe 

 of the prothorax is too variable to be considered as a specific difference. 

 The color of the dark bands of the thorax, as brown or black, depends 

 on less or greater age, respectively, in each of these three species. I 

 attempted to tabulate the length of the superior appendages of the males 

 in terms of the length of the tenth segment, but the degree of protrusion 

 varies in different individuals' at the time of death, and this caused the 

 attempt to be given up. The basal mid-dorsal yellow spot on the seventh 

 abdominal segment of the females is very similar in all three species, 

 being almost as long as the segment and tapering posteriorly, in most 

 individuals. The lower surface of the first femora is pale green in both 

 sexes of all three species, of the second and third femora of the males of 

 all three species blackish. 



The male fraternus from Arkansas, above noted as varying in charac- 

 ter No. 7, has the side of the thorax, between the first and second lateral 

 sutures, filled solidly with pale brown, while the yellow line which ordi- 

 narily separates the antehumeral brown from the posthumeral brown is 

 almost completely obliterated. A female fraternus from Arkansas (see 

 above under No. 8) is like the Arkansan male in these respects ; it also 

 has the antehumeral yellow stripe narrower, not as wide as the adjacent 

 half of the mid-dorsal brown band, the reverse being the case in most 

 fraternus this female has the abdomen 34 mm. long, the hind wing 7: 

 mm. 



