INTRODUCTORY PAPERS ON ICHNEUMONID^.. 77 



species of that tribe ; but I also know that they evince a decided 

 preference for one species, and are generally to be found only on 

 that pabulum. On the Continent Ptero2)horiis Icetus is said to feed 

 in June on Andryala sinuata, and P. aridus in April and May on 

 Coris monspeliensis. Imagos of both species have occurred in this 

 countr}^ ; the former, in Norfolk, not unfrequently. PteropJiorus 

 didactylus, Z., feeds on the Continent in May on the flowers of 

 Geum rivale. This plant seems to affect damp meadows and 

 mountainous woods ; in the Highlands it grows to an elevation of 

 nearly 2800 feet. The larva feeds in the evening, and rests on 

 the flower-stems by day. Neither larvae nor imago have hitherto 

 been observed in this country, but possibly may be discovered 

 here in some habitat of the plant. The water avens {Geum) 

 flowers during May, June, and July, in Britain. 



In concluding this introduction to my contribution to the 

 history of the British Ptevophori, I venture to ask the co-oi)erat,ion 

 of your readers during the coming season in assisting me to 

 obtain larvae, with the food-plants, for figuring. I shall only be 

 too happy to acknowledge such assistance. These larvae should 

 be full grown, unless the 3'ounger forms diff'er materially from the 

 adults. The paragraph on this subject, in the Exchange list, will 

 give the necessary particulars. I think it probable that man}' 

 larvae of this group will be more easil}' found feeding after dusk ; 

 at an}' rate, I know such is the case with several species. 

 London, March 12, 1881. 



INTRODUCTORY PAPERS ON ICHNEUMONIDjE. 



By John B. Bridgman and Edwaud A. Fitch. 



No. II.— ICHNIiUMONID^ {continued). 



Section 5. — Scutellum pale: apex of abdomen and generally the middle 

 spotted or banded with vellow or white. 



A. 2nd and 3rd segments yelbw or fulvous, with or without black 



marks (females). 

 a. Apical margins of remaining segments yellow. 



■'■ Metathorax armed with two acute spines; legs yellow and black 

 varied. ----- 5. arinatoriits, G — H lines. 



=:=* Metathorax not so armed. 

 t Gastrocaeli scarcely perceptible ; tibiae, tarsi, and antennae tawny- 

 yellow ; apex brown. - - - 6. infractorius, 6 — 7 hues. 



