MICEOaASTEE.— AG-ATHIS. 397 



Division AREOLARII. 



Subfam. MICBOQASTEBINJE. 



MICROGASTER. 



Microgaster (Latreille), Forster, Verh. Ver. pr. Rheinl. 1862, p. 245. 



A well-known genus, found in most parts of the temperate regions of the world. 



A 



1. Microgaster mexicanus. (Tab. XV. fig. 24, $ .) 



JSiger, pedibus anterioribus tibiisque posticis late rufis ; alis f umatis, basi fere hyalinis. c? $ • 

 Long. 4 millim. 



Hab. Mexico, Northern Sonora (Morrison). 



Antennae 18-jointed, microscopically pilose. Head and thorax opaque, finery rugosely 

 punctured, covered above with a sparse pubescence ; the pleurae with a longer grey 

 pubescence. Metanotum rugosely reticulated, more shining than the mesonotum ; a 

 stout keel down the centre ; the apex rather abrupt. Abdomen shining, the petiole finely 

 aciculated, raised in the centre, the raised part distinctly margined ; a broad and deep 

 transverse furrow on the second and third segments at the apex, and an indistinct furrow 

 on either side of the second segment before the middle ; the petiole a little longer than 

 broad, and also rather longer than the second segment ; the second segment about one 

 fourth longer than the third, the latter nearly as long as the fourth. Legs stout, shortly 

 pilose ; the first pair reddish, except the bases of the coxae and the tips of the tarsi ; the 

 middle femora broadly black ; the hind femora quite black ; the hind tibiae broadly 

 black at the apex ; the hind tarsi for the greater part fuscous. Wings obscurely smoky, 

 except the lower part behind the recurrent nervure, where they are of a deeper smoky 

 tint ; the cubital nervure almost obsolete beyond the areolet, the latter almost open at 

 the apex ; the recurrent nervure received about the length of the areolet on the lower 

 side in front of the first transverse cubital nervure ; the transverse nervures straight, 

 not curved. 



Subfam. AGATHINjE. 



This subfamily is very numerously represented in tropical regions, and contains 

 some large and striking forms. 



AGATHIS. 



Agathis (Latreille), Wesmael, Nouv. Mem. Acad. Brux. 1837, p. 23. 



The elongated, snout-like face makes this genus easily recognizable. Comparatively 

 few species have been described. 



