APATIIUS. 303 



vertex broad, glabrous, with a deeply impressed cross 

 upon its summit, in the centre of which the ocelli are 

 placed in an almost straight line and contiguously ; an- 

 tenna short, filiform, geniculated, the scape slightly 

 curved, the basal joint of the flagellum subglobose, its 

 second joint as long as the terminal one and subclavate, 

 the rest short, subequal, but gradually increasing in 

 length to the terminal one, which is laterally compressed ; 

 the /ace flat; clypeus transversely lunate but straight in 

 front; labrum lunulate, tuberculated laterally; man- 

 dibles broad and obscurely bidentate ; cibarial apparatus 

 moderate ; tongue twice the length of the labium, taper- 

 ing from base to apex, where it terminates in a small 

 knob, and is clothed with short hair; paraglossce obsolete; 

 labial palpi as long as the tongue, the two first joints 

 long and membranous and tapering to the apex of the 

 second, which is acute, and about one-fourth the length 

 of the first, it has the two very short, subclavate, ter- 

 minal joints, which are conterminous, and articulated 

 just before its acute apex ; maxillce subhastate and acu- 

 minate; maxillary palpi very short, linear, and equal. 

 Thorax globose, pubescent, concealing its divisions; 

 metathorax truncated ; wings with three submarginal 

 cells nearly equal, or the third the largest, the second 

 receiving the first recurrent nervure at about one-third 

 its length, and the second is received by the third sub- 

 marginal cell near its extremity ; legs setose ; the pos- 

 terior tibiae convex, very slightly enlarging from base to 

 apex, rounded at the extremity externally, and unfur- 

 nished with means to convey pollen ; posterior plantae 

 oblong, narrowly equal, and not auriculated ; claws bifid. 

 Abdomen ovate, convex above, deflecting toward its ex- 

 tremity, and subglabrous on the disk, the terminal 



