158 HYMENOFTEEA. 



and apex, the third at the apex ; the apical segment rugose', covered with depressed, 

 reddish, stiff hairs ; the other segments with a silvery pile at the apex laterally. Legs 

 covered with a whitish pubescence; the tibial spines pale; the apical joint of the 

 tarsi testaceous. Squama longer than broad (longer than in any other species known 

 from our region), the lateral edge triangular ; the spine not twice longer than broad, 

 the apex incised. 



^ 5. OxybelllS argenteopilosUS. (Tab. IX. %g. 23; 23 a, thoracic process.) 



Long. 4^ millim. $ . 



Hab. Mexico, Venta de Zopilote in Guerrero 2800 feet (H. H. Smith). 



Agreeing with 0. aztecus in having the bands on the abdomen broken, and also in 

 the rest of the coloration, except that it has a spot on either side of the scutellum, and 

 the hind tibise are only yellow at the base, and the hind tarsi are entirely black. It 

 also has a furrow along the inner orbits of the eyes near the ocelli ; the mesonotum is 

 without depression ; and, as will be seen from our figure, the form of the thoracic 

 process is very different, the squama (and the spine also, this being shorter and broader 

 than in the other species of the genus known to me) much shorter and broader. 



Fam. POMPILID^l. 



The difficulty of defining and limiting the genera in this large family is considerable. 

 The arrangement here adopted is that followed by Kohl, Verh. zool.-bot. Ges. Wien, 

 1884. 



CEROPALES. 



Ceropales, Latreille, Prec. Caract. gen. des Ins. p. 123 (1796) ; Kohl, Verh. zool.-bot. Ges. Wien, 

 xxxiv., Abhandl. p. 51 (1884). 

 This genus, chiefly on account of the difference in the structure of the male genital 

 armature, is referred by Eadoszkowski [Bull. Mosc. nouv. ser. ii. p. 489 (1889)] to a 

 distinct family. 



1. Ceropales agilis. (Tab. X. fig. 1, $ .) 



Ceropales agilis, Smith, Journ. Ent. ii. p. 269 \ 



Hab. Mexico 1 , Amula in Guerrero 6000 feet, Teapa in Tabasco (H. II. Smith), 

 Orizaba (Sumichrast), Temax in North Yucatan (Gaumer) ; Guatemala, San Geronimo, 

 Capetillo (Champion) ; Nicaragua, Chontales (Belt). 



2. Ceropales albopicta. 



Ceropales albopicta, Cresson, Proc. Bost. Soc. Nat. Hist. xii. p. 378 \ 

 Hab. Mexico, Orizaba (Sumichrast l ) ; Panama (Boucard). 



