BELOSTOMA. 367 
BELOSTOMA. 
Belostoma, Uatreille, Gen. Crust. et Ins. iii. p. 144 (part.) (1807); Amyot et Serville, Hist. Nat. 
Ins. Hémipt. p. 427 (1843) ; Fieber, Gen. Hydroc. p. 21, t.. 2p (1851) ; Mayr, Verh. zool.- 
bot. Ges. Wien, xxi. pp. 402, 422 (1871). 
Belostomum, Burmeister, Handb. der Ent. ii. 1, p. 195 (1835). 
Amorgius, Stal, Hemipt. Afric. ii. p. 179 (1865). 
This genus includes about ten species, six of which are American. ‘Three only are 
known to me from within our limits, but B. grande (Fabr.) may yet be found on the 
Isthmus of Panama, or B. whleri, Mont., or B. grisewm, Say, in Northern Mexico. 
They are all of very large size, some specimens of B. grande measuring upwards of 
four inches in length (109 millim.). The sexual characters (as well as those of the 
allied North-American genus Benacus) have been described and figured by Riley (Proc. 
Ent. Soc. Wash. iii. pp. 83-88, figg. 4, 5); he says that the only external indication of 
the sexes is, that the last ventral segment of the abdomen is entire in the male, and 
slightly notched and bimucronate at the apex in the female. B. colossicum belongs to 
Stal’s section Amorgius, the others to Belostoma, s. str. 
1. Belostoma colossicum, (Tab. XXII. fig. 4, ¢.) 
Belostoma collosicum (sic), Stal, Ofv. Vet.-Ak. Férh. xi. p. 240 (1854) '. 
Belostoma colossicum, Stal, Ofv. Vet.-Ak. Forh. xviii. p. 205°; Mayr, Verh. zool.-bot. Ges. Wien, 
XXl. pp. 423, 425°; Mont. Ann. Soc. Ent. Belg. 1895, pp. 472, 477, fig. 2°. 
Hab. Mexico (Mus. Vind. Cos.34), San Juan Bautista in Tabasco (A. A. Smith) ; 
Hownpuras! (Hjalmarson, in Mus. Holm.?*); Costa Rica, San José (Biolley, in coll. 
Distant). 
Differs from its allies in the dilated lateral margins of the pronotum. ‘The hind 
tibie have (as in B. angustipes) a sharp spine at the inner apical angle beneath. 
Mr. H. H. Smith has sent us a single male specimen of this species from Tabasco, and 
Mr. Distant has received a female of it from Mr. Biolley from Costa Rica. 
2. Belostoma annulipes. (Tab. XXII. figg. 3, 3a, 3.) 
Belostoma annulipes, Herr.-Schaff. Wanz. Ins. vii. p. 28, t. 258. figg. 808, 804 (1848) '; Mayr, 
Verh. zool.-bot. Ges. Wien, xxi. pp. 424, 427°; Uhler, Bull. U.S. Geol. & Geogr. Surv. i. 
p- 837°; Proc. Calif. Acad. Sci. (2) iv. p.291*; Mont. Ann. Soc. Ent. Belg. 1896, p. 514°. 
Belostoma ruficeps, Duf. Ann. Soc. Ent. Fr. 18638, p. 382° (excl. var.). 
Belostoma signoreti, Duf. loc. cit. p. 382". 
Hab. Nortu America, Southern and Western United States ® 34. Lower California 4.— 
Mexico 3, Presidio de Mazatlan (forrer), Tabi in Yucatan ( Godman), Temax in 
Yucatan (Gaumer); British Honpuras, Cayo (Blancaneaur); Guatemata, Torola, El 
Jicaro in Vera Paz (Champion); Nicaracua, Chontales (Janson); Costa Rica (Van 
