268 Mr. P. Cameron on new Species of 



the seventh seo^ment fulvous, blackish In the centre, and with 

 two small yellow marks ; the ventral segments entirely black, 

 shining, shortly and sparsely haired. 



In the above described example the neuration of the wings 

 is irregular ; the stigma is black ; the nervures are fuscous ; 

 the basal abscissa of the radius is oblique, straight ; the first 

 transverse cubital nervure is curved. In one wing there are 

 two transverse cubital nervures between this latter and the 

 normal first and third, and in the other one beyond the usual 

 number, the position beinj^; irregular in both, the size of tiie 

 cellules, too, showing a difference. 



A second specimen from Omiltenie is probably a variety of 

 the same species. It is a little smaller ; the scutellum is not 

 so sharply peaked and hardly bifid ; there is no mark on the 

 median segment and no yellow lines on the abdominal 

 segments. The alar neuration appears to be fairly normal; 

 the first transverse cubital nervure is obliquely curved and 

 is almost (in one wing quite) united to the second and to the 

 apex of the basal abscissa of the radius ; the second nervure 

 is slightly oblique, the third almost straight ; the first re- 

 current nervure is received quite close to the first transverse 

 cubital, the second shortly before the middle of the cellule. 



Trigonalys maculifronSj sp. n. 



Flava, nigro-maculata ; alis hyalinis, anticis furaatis, nervis 



fulvis. $ . 

 Long. 11 millim. 



JIah. Mexico, Teapa in Tabasco (77. //. Smith). 



Antennai rufous, the base of the fiagelluin blackish; the 

 scape black above ; the third and fourth joints about equal. 

 Head lemon-yellow ; the upper part thickly covered with 

 short fuscous hair, the oral region and the mandibles with 

 longer white hair; the teeth of the mandibles, a line from the 

 end of the vertex to the antennai tubercles, becoming gradu- 

 ally wider to the apex, dilated at the sides, and enclosing a 

 yellow mark, broader than long, below the ocelli, a somewhat 

 oval mark on the occiput, from which (but not touching it) a 

 broad line runs to the eye, which it joins, and behind the top 

 of the eye a somewhat triangular mark, black. The meso- 

 notum is coarsely punctured, thickly covered with short 

 fuscous hair ; the parapsidal furrows are distinct ; on the 

 outer side of these is a black line reaching to the scutellum, 

 and there is an equally broad line (but narrowed at the base) 

 down the centre ; the scutellum is bordered at the base and 

 sides with black, and in tiie apex in the centre is a black 



