or 
ZAITHA, 36 
1. Zaitha anura, (Tab. XXII. fig. 1, ¢.) 
Diplonychus anurus, Herr.-Schaff. Wanz. Ins. vill. p. 26, t. 257. fig. 799°. 
Zaitha anurus, Duf. Ann. Soc. Ent. Fr. 1863, p. 388°; Mayr, Verh. zoal.-bot. Ges. Wien, xxi. 
pp. 408, 412°; Uhler, P. Z.S. 1894, p. 223*; Proc. Calif. Acad. Sci. (2) iv. p. 291°. 
Zaitha boscii, Herr.-Schaff. Wanz. Ins. ix. p. 86°; Mayr, Verh. zool.-bot. Ges. Wien, xiii. p. 354". 
Zaitha stollii, Duf. Aun. Soc. Ent. Fr. 1863, p. 387 ° (part.). 
Zaitha cupreomicans, Stal, Ofv. Vet.-Ak. Férh. 1854, p. 240°; Stett. ent. Zeit. 1862, p. 461°". 
Zaitha subspinosa, Duf. Ann. Soc. Ent. Fr. 1863, p. 387". 
Hab. Nortu America, Florida and South-western States 4, Lower California >.— 
Mexico 34910 (#Hége), Presidio de Mazatlan (Forrer), Teapa (H. H. Smith), Tabi in 
Yucatan (Godman), Temax in N. Yucatan (Gaumer); Guatemata, Paso Antonio, 
Torola (Champion) ; Costa Rica (Biolley, in coll. Distant); Panama, David, Volcan de 
Chiriqui, Panama city (Champion).—Gutana!!; Brazin 1238; Anrinies, Cuba?4, San 
Domingo ¢ !!, Grenada 4. 
Of this. common and widely distributed American insect we possess seventeen 
specimens from within our limits, including both sexes. In the single male from 
David the sixth ventral segment is somewhat acutely produced at the apex. Z. anura 
is the largest Central-American member of the genus. One of Stal’s types of 
Z. cupreomicans has been examined. 
2. Zaitha elliptica. (Tab. XXII. fig. 2, ¢.) 
Belostoma ellipticum, Latr. in Humboldt et Bonpland’s Obs. Zool. ii. p. 105, t. 89. fig. 4°. 
Zaitha elliptica, Mayr, Verh. zool.-bot. Ges. Wien, xxi. pp. 408, 415°. 
Hab. Mexico (coll. Signoret, in Mus. Vind. Ces.”). 
Very like Z. anura, but more narrowed anteriorly. A male from “ Mexico” 
belonging to the Vienna Museum has been examined; this is figured on our Plate. 
No locality was given by Latreille !. 
3. Zaitha fusciventris, (Tab. XXI. figg. 23, ¢; 23 a, head.) 
Zaitha fusciventris, Duf. Ann. Soc. Ent. Fr. 1863, p. 889°; Mayr, Verh. zool.-bot. Ges. Wien, 
Xxl. pp. 417, 4197; Uhler, Bull. U.S. Geol. & Geogr. Surv. i. p. 338°; Proce. Calif. Acad. 
Sci. (2) iv. p. 291 *. 
Hab. Nortu America, Arizon#* and California’, Lower California +-—Mexico !3 
(Mus. Holm.; Mus. Vind. Cos.2; Mus. Brit.).—Mexico, Tabi in Yucatan (Godman), 
Temax in N. Yucatan (Gaumer); GuatemaLta, San Gerénimo, Duefias, Torola 
(Champion); Honpuras (Mus. Brit.). 
We have three males and five females of this species, and two males belonging to 
the Vienna Museum (determined by Mayr) have been examined. Z. fusciventris is 
extremely like Z minor, but differs from it in having the head depressed or foveate on 
