NATURAL SCIENCES OF PHILADELPHIA. 147 



ments black, remainder white, with base of third segment narrowly 

 black : second seijraent with a white dot on each side near base. 

 Smooth and shining; metathoracic spines A'ery long, sliglitly re- 

 curved at tip wliich is obtuse ; areolet quadrate, closed ; abdomen 

 robust beyond first segment; legs and antennie ver}- long and 

 slender. Length 5^ lines. 



%. More slender than 9, witli face entirely white, and all the 

 abdominal segments black, banded at apex with white.. 



Orizaba; Cordova. (Sumichrast, No. 105.) Common. 



11. Polycyrtus accuratus, n. sp. 



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

 margin of prothorax, two short lines on each lateral lobe of meso- 

 thorax, an oblique line on each side leading to scutellum, apex 

 of scutellum and tegula?, white; antenna? black, with broad white 

 annulus ; middle and base of scutellum black ; base of metathorax 

 with two nearly contiguous blaclc spots reaching to transverse 

 carina; remainder of thorax luteous; legs luteous, except four 

 anterior tarsi which are blackish ; wings hyaline, nervures fus- 

 cous ; abdomen luteous, paler than rest of body, first segment ex- 

 cept apex, base of second and narrow basal margin of third seg- 

 ment, black. Form slender, smooth and sliining; frontal horn 

 obtuse ; metathoracic spines long and blunt ; areolet of anterior 

 wing transversely- quadrate, closed ; abdomen slender, rather 

 thickly clothed with appressed black pubescence, and at apex be- 

 neath with long black hair. Length 5^ lines. 



Mirador. 



12. Polycyrtus furvus, n. sp. 



%. Head, antennne, pro- and mesothorax, most of scutellum 

 and posterior femora, black ; cl^'peus, labrum, spot on mandibles, 

 palpi, broad annulus on antennjc, and two slender oblique lines 

 before scutellum, white ; pleura metathorax, and four anterior legs, 

 dull luteous ; metathorax above and posterior coxre dark fuscous 

 or blackish ; four anterior tibiae yellow, their tarsi dusky, posterior 

 tibiae and tarsi pale 3'ellow; wings hyaline, faintly duskj'- at tips, 

 nervures black ; first, second, and base of third segments of abdo- 

 men black, the remainder pale brown ; narrow apical margin of 

 first segment, broad apical margin, and a short narrow stripe on 

 basal lateral margin of second segment, pale. Form slender, 

 smooth and shining ; antennae longer than body ; frontal horn long, 



