INTRODUCTORY PAPERS ON ICHNEUMONID^. 17 



Middle of abdomen red ; legs yellow, hind coxae, trochanters, base 

 and apex black ; tarsi slightly brownish (male), costulatus, 5^ lines. 

 2. Forehead without ridges above the base of the antennse. 

 Apex of hind femora red. 



Apex of 2nd segment, 3rd entirely, and extreme base of 4th 

 chestnut (female); legs and abdomen of male paler, red colour 

 more extensive. .... femorator, 7 — 7^ lines. 



Apex of hind femora not red. 

 ! Middle of abdomen and greater part of front legs yellowish ; middle 

 of hind tibiae broadly yellow ; Brd segment without a lateral 

 black streak. ------ confusus, 6i lines. 



!! Middle of abdomen red ; legs partly red ; 3rd segment with a lateral 

 black streak ; sides of metathorax moderately pubescent ; groove 

 of metanotum regularly transversely rugose, tenuis, 4i — 5 lines. 

 B. Back of metathorax not concave (male and female). 



Middle of abdomen and legs partly red. 8. leptoyaster, 4 — 5 lines. 



Gravenhorst's original genus Campoplex has been broken up 

 by Holmgren, in his ' Monographia Ophioniduin Suecise,' into 

 many subgenera, which may be arranged in two divisions — those 

 having the metathoracic spiracles elongate, with one exception 

 (Charops decipiens) , fovToaing the genus Campoplex; and those in 

 which they are circular, subdivided into eight subgenera. Later, 

 Forster divided his family Campoplegoidce into sixty-two genera, 

 in his ' Synopsis der Familien und Gattungen der Ichneumonen ' ; 

 these have not been adopted. Forster's ' Monographie der 

 Gattung Campoplex, Grv. ' (Verb. z.-b. Ges. Wien, xviii. 761 — 

 876, pi. X. ; 1869), and Holmgren's ' Om de Skandinaviska arterna 

 af ophionidslagtet Campoplex' (Bihang Sv. Ak. Handl., vol. i., pt. 2, 

 pp. 1-90), must be consulted for this genus ; seventy-nine species 

 are described in the former and forty-two in the latter paper. There 

 is a very great similarity in the coloration of the species ; Forster 

 divided them into two groups according to the colour of the 

 hind femora (red or black). Other distinctions are that the spaces 

 between the punctures of the mesopleura are smooth or reti- 

 culate ; at the front part of the mesopleura, just above the 

 anterior coxse, is an oblong depression into which the base of the 

 front legs fits ; this groove is sometimes smooth behind, or it is 

 as it were separated from the mesopleura by a vertical ridge ; the 

 lower margin of the third segment of the abdomen is either 

 convex or concave ; the absence or presence of a lateral streak at 

 the base of the third segment ; the colour of the mandibles and 

 tegulae, &c. From these remarks it may be gathered that 

 specimens of Campoplex gummed down on a card are almost 



ENTOM. — JAN., 1885. D 



