NATURAL SCIENCES OF PHILADELPHIA. 125 



spines ; abdomen elongate, slender at base, gastrocoeli moderate, 

 genital organs largely developed. Length 6^-*7 lines. 

 Orizaba. 



55. Ichneumon abitus, n. sp. 



% . Yellow ; a spot on vertex connected with a line extending 

 from eye to eye, and also to posterior margin of occiput, antennae 

 except scape beneath, spot on middle of prothorax, three longi- 

 tudinal lines on mesothorax, basal suture of metatliorax, an in- 

 terrupted line down the middle, tips of posterior tibiae, their tarsi 

 except base, spot on middle of first abdominal segment, basal 

 half of the second, third, and fourth, and base of remaining seg- 

 ments narrowly, black ; wings hj^aline, tinged with yellowish, 

 stigma pale honey-yellow ; kgs faintly tinged with fulvous. Form 

 rather slender ; head not buccate ; scutellum subconvex ; meta- 

 thorax rounded, without lateral tubercles or spines. Length 5 

 lines. 



Cordova. (Sumichrast, No. 106.) 



56. IchneumoTi durus, a. sp. 



Z. Yellow; spot on vertex, transverse line on occiput, an- 

 tennre except scape, three broad lines on mesothorax, basal suture 

 of metathorax and spot on basal middle, spot beneath tegulae, 

 extreme tips of posterior tibias and sometimes of femora, their 

 tarsi except base, a narrow irregular band on base of second ab- 

 dominal segment, broader ones dilated on middle posteriorly on 

 third and fourth segments, and narrow one on the fifth, all black; 

 wings 3'ellow-h3'aline, nervures and stigma honey-yellow. Form 

 rather slender ; head not buccate ; scutellum subconvex ; meta- 

 thorax rounded, without tubercles or spines. Length Gi lines. 



Cordova. (Sumichrast, No. 15G.) 



57. Iclineunion Alvarado. 



Ichneumon Aloarado, Cress., Trans. Am. Eut. Soc, ii. p. 7. '^ . 



Orizaba; Cordova. (Sumichrast, No. 112.) Common. The 

 antennae of 9 are Ijlack above with a whitish annulus, fulvous be- 

 neath, with black tips, robust, and involute. This species varies 

 in length from 6 to T^ lines. 



58. Ickneumon decorosus. 



Ichneumon decorosus, Cress., Trans. Am. Eut. Soc, ii. p. 8, %. 

 Cordova. 



