NATURAL SCIENCES OF PHILADELPHIA. 145 



6. Polycyrtus mancus, n. sp. 



9. Very much like jjiacer, differing as follows : Size smaller- 

 the mesothorax has two short white discal lines ; the scutellum is 

 entirely white ; the transverse bar of the cruciform black mark 

 on metathorax is abbreviated laterally and not confluent with 

 stigmatal spot ; the second abdominal segment has a transverse 

 white mark near the base ; otherwise as in macer. Length 4| 

 lines. 



% In this sex the central black stripe on metathorax is 

 slender, being dilated between the spines, crossed b}' a slender 

 line near base and confluent on each side with stigmatal spot. 



Orizaba. 



7. Polycyrtus paululus. n, sp. 



9. Head, antennoe, and mesothorax black ; face, mouth, orbits, 

 broad annulus on antenna?, collar, line before tegula?, two short 

 discal lines on mesothorax, two oblique lines before scutellum, 

 tegulffi, scutellum except basal excavation, and spot on postscu- 

 tellum, white; pleura and metathorax whitish, basal suture of the 

 latter and three narrow longitudinal stripes, black ; legs pale 

 honey -yellow ; wings hyaline, iridescent ; abdomen above black, 

 apical margin of all the segments white. Small, slender, smooth 

 and shining; frontal spine short and acute; metathorax rugulose 

 down the middle, the spines long and acute ; abdomen verj^ slen- 

 der at base, gradually dilated towards apex; arcolet minute, 

 closed. Length 4 lines. 



Cordova. (Sumichrast, No. 134.) 



8. Polycyrtus junceus, n. sp. 



% Black; face, mouth, orbits, interrupted behind, apex of 

 frontal spine, broad annulus on antennas, collar, spot on each side 

 before mesothorax, tegular, scutellum except base and central 

 spot, confluent with an oblique line on each side extending nearly 

 to tegulffi, and apex of postscutellum, white ; pleura and meta- 

 thorax whitish, the latter with two nearly confluent spots at base 

 to transverse carina and tlien a central black line dilated at each 

 end; wings hyaline, faintly fuscous at apex, nervures black; legs 

 yellowish, four posterior coxae with two faint fuscous stripes, the 

 trochanters and femora above, base of posterior tibite and the 

 four anterior tarsi, blackish; abdomen black above, lateral and 

 apical margins of all the segments white, becoming broader ou 



