856 ACADEMY OP NATURAL SCIENCES 



SO striking in many species. The thoracic lines are so dilated as 

 to give the thorax the appearance of being entirely dull reddish- 

 brown. 



NEMOLETUS Meig. 



N. POLYPOSUS. — Black ; feet yellowish ; thighs black at base. 



Inhabits Mexico. 



Body black, with a slight tinge of purplish, polished : wings 

 white, costal and basal nervures yellowish : poisers white : feet 

 honey-yellow ; thighs, except at tip, black ; tarsi, terminal joint 

 black ; posterior tibise black in the middle : venter immaculate. 



Length more than three-twentieths of an inch. 



This is closely allied to the species which I described under 

 the name ofpallipes. 



STRATIOMYS. 



S. TRiviTTATA. — Greenish; thorax with three, tergum with 

 one black vitta. 



Inhabits Mexico. 



Head yellowish-green ; front and vertex brownish, each with a 

 transverse, somewhat undulated line: antennae reddish-brown, 

 paler at base : thorax green, with three broad black vittae : scutel 

 greenish, two-spined, [161] immaculate : poisers pea-green : 

 tergum yellowish-green, with a dilated, crenate vitta : pectus 

 with a broad black vitta : proboscis and point each side on the 

 hypostoma, black. 



Length nearly seven-twentieths of an inch. 



S. GONIPHORA. — ^Black ; thorax with minute golden hairs : be- 

 neath greenish. 



Inhabits Mexico. 



Head yellowish-white, two undulated black frontal bands : 

 vertex black, yellowish behind : hypostoma with a lateral black 

 dot, sometimes obsolete : proboscis black : antennae black : occi- 

 put black : thorax with numerous small golden hairs ; a yellow- 

 ish line over the wings : scutel black, posterior margin and spines 

 yellow : wings hyaline ; costal nervures and cellule yellowish ; 

 middle nervures blackish : tergum black, with lateral yellow 

 triangles and tip ; beneath pale greenish : pectus on the disk 



[Vol. VI. 



