376 PROCEEDINGS OF THE ACADEMY OP 



deeplj^ sulcate behind, and obliquely striated ; impressed lines of 

 mesothorax not roughened ; otherwise the form and sculpture are 

 similar to niger. Length 12 lines. 



Cordova ; Orizaba, Easily recognized by the black violaceous 

 anterior wings having each a large hj'aline median spot. 



3. Thyreodon laticinctus, n. sp. 



9. Black, form and sculpture as in niger; wings lilack, with a 

 very strong brassy gloss; abdomen polished, the third and basal 

 half of fourth segments lemon-yellow. Length one inch. 



Orizaba. A very conspicuous species. 



4. Thyreodon ornatipennis, n. sp. 



9. Brownish-ferruginous, metathorax darker; eyes ovate, not 

 unusually large, ocelli small ; antennse fulvous, dark at base ; thorax 

 very densely and finely sculptured ; middle of mesothorax longi- 

 tudinally furrowed ; scutellum deeply excavated at base, with 

 lateral carina ver}'- prominent ; metathorax flattened on its posterior 

 face, the apex deeply excavated ; wings dark fuliginous, the middle 

 of both pairs with a large yellow mark; legs and abdomen light- 

 brown, tips of tarsi and base of second abdominal segment black, 

 sides of segments 2, 3, 4, 5, stained with fuscous. Length 17^ 

 lines. 



Orizaba. (Sumichrast, No. 63.) 



Genus ANOMALON, Jur. 



1. Anomalon mexicanum, n. sp. 



9. Large; lemon-3'ellow; headbuccate; extreme tips of mandi- 

 bles, spot on vertex, antennae, three stripes on mesothorax, large 

 mark on pleura continued beneath, and two spots on lateral basal 

 margin of metathorax, black; antonnne about three-fourths the 

 length of body ; mesothorax coarsel}^ rugose ; metathorax coarsely 

 reticulated; scutellum depressed medially; wings dusky-hyaline, 

 fuscous at tips ; first submarginal cell receiving recurrent nervurea 

 little beyond the middle, discoidal cell short, not more than half 

 the length of first submarginal, contracted to a point at tip ; four 

 anterior legs entirely lemon-yellow, posterior femora and tibiae 

 ferruginous, their coxa>, except tips, trochanters, base of femora 

 and tarsi, black, tips of coxsie 3'ellow ; abdomen ferruginous, the 

 first and dorsal edge of second segment black. Length lOi lines. 



Orizaba. (Sumichrast, No. 08.) 



