ICHNEUMON. 147 



Antennae nearly as long as the abdomen and thorax together, subinvolute and 

 thickest at the apex, stout, the third joint nearly one fourth longer than the fourth, 

 the scape ferruginous. Face flat, eyes margined ; the middle of the face, and the orbits 

 yellowish. Head punctured, the punctures rather large. Mesonotum longitudinally 

 strongly punctured ; the pleurae less strongly, and if anything more closely punctured, 

 and more shining. Scutellum but slightly raised above the scutum, the sides subcarinate, 

 the upper part flat and covered with large punctures, which form longitudinal rows. 

 Metanotum closely punctured, the tubercles short ; the upper median area broader 

 than long, rounded behind, truncated in front ; the sides of the lower median area not 

 very clearly indicated. Petiole smooth and shining, the sides inclining to yellow ; post- 

 petiole finely aciculate. Abdomen shining, the apex acute ; gastrocceli flat, aciculate, 

 the sides striated ; the rest of abdomen punctured, but not strongly, all over. Legs 

 stout, the coxae punctured, the apices of the tarsal joints black. 



A larger species than I. lariceus, with the abdomen longer and much more acutely 

 pointed ; the colour, too, is paler, and the punctuation is not so strong, except on the 

 scutellum ; the base of the flagellum is fuscous ; the wings are darker and longer ; and 

 the antennae are also longer. I. dilucidus is a larger insect with the wings clearer ; the 

 scutellum more sharply raised over the scutum, and with its sides much more dis- 

 tinctly carinate, the punctuation closer ; and the abdomen longitudinally striated. 



24. Ichneumon lariceus. (Tab. VII, fig. 9.) 



Ferruginous ; antennarum medio albo, apice brunneo ; alis fusco-hyalinis, nervis fuscis, stigmate fusco, basi 



albo. 

 Long. 10 millim. 



Hah. Mexico, Northern Sonora (Morrison). 



Head and thorax closely punctured all over, and covered with a white pubescence. 

 Scutellum smooth, almost impunctate, shining, not much raised above the scutum, 

 narrowed towards the apex ; a keel running from the mesonotum at the end of the 

 fovea at its base to the middle of the scutellum. Metathoracic areae all well defined, 

 the supramedian area horseshoe-shaped, the middle of the metanotum slightly exca- 

 vated ; lateral tubercle not very large. Petiole distinctly keeled along the sides above ; 

 the apex longitudinally and finely striated. The rest of abdomen closely punctured like 

 the thorax ; apex bluntly acuminate ; sheath of ovipositor projecting, black. Gastrocceli 

 obsolete. Areolet 5-angled, bullae distinct. Legs robust, covered with a white pubes- 

 cence; coxae closely punctured. Antennae stout, involute; third and fourth joints subequal. 



/. dilucidus comes very near the present species, but differs in being larger, in having 

 the abdomen longitudinally aciculate, the stigma quite black, the areolet converging 

 above, &c. Its smaller size, half fuscous and half white stigma, and obsolete gastro- 

 cceli distinguish it from /. phcedra. 



uu2 



