NATURAL SCIENCES OF PHILADELPHIA. 165 



of tibiffi and tarsi entirely, black, four anterior femora entirely 

 yellow ; abdomen short and very slender, the first segment entirely 

 yellow except subapical black spot. Length 5 lines. 

 Orizaba. (Sumichrast, No. 22). 



4. Christolia mirabilis, n. sp. 



9. Head, antennre and thorax marked as in znpotecux, all the 

 markings except annulus on antennae which is pure white, lemon- 

 yellow ; pleura j^ellow beneath; metathorax with two large sub- 

 quadrate lemon-yellow marks on posterior face covering tubercles, 

 as well as a large ovate spot on flanks ; legs lemon yellow, a broad 

 stripe on outside of posterior coxre, trochanters above, all the 

 femora above, four anterior tibite except tips, and their tarsi, and 

 haaal half of posterior tibia?, black; abdomen black, narrow late- 

 ral and broad apical margins of three basal segments, and the re- 

 maining segments except a narrow transverse black band at base, 

 lemon-jellow ; wings hyaline, nervures black. Form same as that 

 of zapotecu!< ; meso- and metathorax coarsely rugose and more or 

 less reticulated, the latter truncate behind, with short robust, ob- 

 tuse tubercles ; abdomen smooth and polished ; ai-eolet open. 

 Length 6 lines. 



%. Antennte entirel}^ black; wings dusky at apex; four an- 

 terior femora entirely yellow, posterior pair black above and at 

 base and apex beneath, their tibine entirely black; otherwise as iu 

 9. Length 5^ lines. 



Orizaba. 



5. Christolia mirandus, n. sp. 



9. Color and mnrkings as in mirahilis^ except as fullows : 

 metathorax has a triangular yellow spot on each side at base ; the 

 pleuraand also posterior coxae are marked as in zapotecu.s ; the 

 legs are luteous-yellow, apex of four posterior trochanters, poste- 

 rior knees, apex of their tibiiB and tarsal tips, black. Form more 

 robust, abdomen shorter and broader, being almost oval beyond 

 first segment ; metathorax obliquely truncate behind, the tuber- 

 cles very short and blunt. Length 5| lines. 



Orizaba. 



6. Christolia abdominalis, n. sp. 



9 Head, antennae, and thorax black; orbits interrupted on 



each side of insertion of antennoe and behind summit of eyes, 

 clypeus, broad annulus on antennae, line on collar, teguUe, spot 



