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The three known species of this genus are shiny little creatures of a 

 brown mottled aspect. The termination of the marginal nervure of the 

 wing before the apex and the position of the ocelli will at once show their 

 relationship with Acocephahis, from which genus their tumid punctured 

 head will seperate them. The ocelli are placed more interiorly than is usual 

 in the Acocephalina on account of the encroachment of the vertex onto the 

 base of the front. 



15. XESTOCEPHALUS PULICARIUS, n. sp. 



Brown varied with pale yellowish, Vertex twice as long on the middle 

 as next the eye, marked with a double pale median line which is deflected 

 to either side just before the tip and runs parallel with the anterior edge to 

 the outer angle of the eye. Sometimes this line forms a loop behind the 

 ocellus where it may break and form a dot on the disc : Usually there is 

 a dot at the basal angle of the eye, a line between the ocellus and eye and 

 two concentric wavy lines on the base of the front ; apex of the head ful- 

 vous. Pronotum marked with four dots on the anterior submargin, the 

 outer angles, a dot adjoining and a few obscure marks on the disc. Basa^ 

 field of the scutellum with two median pale vittae, diverging posteriorly, 

 apical field pale, dusky on the disc. Elytra brown marked with one or two 

 whitish spots in each areol except the costal which is subhyaline nearly to 

 its base. These spots frequently become confluent along the inner margin 

 of the corium and at its apex. Face tawny yellow, more or less washed 

 with brown especially on the front and lorae. Beneath and legs tawny, 

 posterior tibiae and base of the venter generally embrowned. Last ventral 

 segment of the female emarginate at the middle leaving a feebly rounded 

 lobe on either side; pygofers triangular, broad at base, the acute tip 

 moderately exceeded by the stout oviduct, Ultimate ventral segment of 

 the male nearly double the length of the penultimate, its posterior edge 

 broadly excavated, Valve scarcely appearant, slightly arcuated behind; 

 plates ligulate at base, tapering beyond the middle to the obtuse apex 

 which is fringed with long, soft white hairs and armed along the inner edge 

 with a few stout spines. Length 2^ to 3 mm. 



New York, Canada. This pretty little insect is sometimes 

 abundant in August and Sept. about Buffalo in swampy pas- 

 tures where Carex vulpinoidea grows. I have also taken it at 

 Ridgeway Ont. , and Mr. E. B. South wick has sent me two ex- 

 amples captured near New York City in August. The mark- 

 ings of the vertex and pronotum are at times partially obliter- 

 ated but the geminate median line on the vertex and the diver- 

 gent vittae on the base of the scutellum seem to be constant. 



16. XESTOCEPHALUS FULVOCAPITATUS, n. sp. 



A little larger than the preceding with the head clay-yellow or tinged 

 with fulvous, generally immaculate except a brown spot on the lorae and a 

 black cloud beneath the antennae, sometimes the females exhibit an oblique 

 brown dash on either side on the disc of the vertex. Pronotum and scutel- 



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