109 



INTRODUCTORY PAPERS ON ICHNEUMONID^. 



By John B. Bridgman and Edwaud A. Fitch. 



No. II.— ICHNEUMONIDiE (continued). 



The compilation of a concise table of our species of Amhlyteles 

 is a very difficult matter. The variation in manj^ species is even 

 greater than in the genus Ichneumon, and we again have not only 

 the varieties inter se, but the great resemblance one species often 

 bears to another in colour and markings, and the often great dis- 

 parity between the sexes, or rather supposed sexes, of a species, 

 for in several instances it is doubtful whether they are correctly 

 paired. A. conapurcatiis is still without a female. Tischbein 

 considers ^. jjaZZiatorius ?inA A. spoliator one species; his series 

 comprised sixty-two males and eighteen females. Brischke 

 follows AVesmael in thinking that A.fossorius and A. divisorius 

 ought to be united, while, on the other hand, Tischbein thinks 

 Wesmael's A. inspector is distinct. Brischke also separates A. 

 subcylindricus (Marshall's Cat., p. 22, 1. 14, '' cylindricus'" should 

 be "subcylindricus ") from A. Gravenhorstii. Some of our species 

 vary greatly, but perhaps the most remarkable case is A. uni- 

 guttatus. Of this species Wesmael described sixteen well- 

 marked varieties, and gave thirteen species, hitherto considered 

 distinct, as probable synonyms (these included conspurcatus) . 

 Tischbein describes and tabulates forty varieties of A. uniguttatus 

 male, which include eight Gravenhorstian species (Stettin Ent. 

 Zeit., xxxvi., 274). 



A gynandromorphous specimen of the common A. armatorius — 

 better known by its Fabrician name of fasciatorius — is described 

 by Wesmael (Bull. Ac. Brux. vi., pt. 2, p. 448) ; the head and 

 antennae are male (armatorius), and the abdomen is female 

 {quadrimaculatus). Taschenberg has also described a gynandro- 

 morphous Amhlyteles as A. liermaphroditus (Berl. Ent. Zeit. xiv., 

 p. 425), which he says is near A. cavielinus and A.fossorius. A 

 specimen of A. cerinthius, with an e^'e almost obliterated, is 

 described by Eev. T. A. Marshall (Ent. Mo. Mag. xiv. 278). 



There are many good figures of Amhlyteles. A. mesocastanus 

 [vespertinus) and A. Proteus are figured by Christ. A. Proteus is 

 also figured by Donovan (pi. 478), with .one or two other doubtful 

 species. Capital figures of A. momtorius, armatorius {fasciatorius), 



