No.TJ(i(.. TCHNEIUTON FLIES— ARITMEAT). 21 



Mrtatliiirax witli (lie arenhi ?io/ scinicin-ular; scutclliuii niar^iiicd lalcrallv \n 

 beyond the middle; second iil)doniinal setinient with tlie tliyridia occu- 

 pying the entire breadth and scarcely separated at tlu; middle. 



(70) /ilu'.iiilermn.s Fi'irstcr. 



(Tyjie, unknown.) 



Metathorax with the basal median and basal lateral areas conflui'iit : scutcllum 



maririned laterally only at base; second abdominal sesjnuMil wilh the 



thyridia widely separated at the middle. 



'^71) »S'toiO(/o/(/«.s- Berthonmieu. (=<,'iiatIiiu-i/K W'csmacl.) 

 (Type, Ichneumon inair/inrHns (iravcnhorst. ) 



Tribe V. ALOMYINI. 



1844. Tchneiunmirti Jietenxjiistri Wksmael, Nouv. Mem. .\ca(l. Sci. lirux.. Will, 



]). 217. 

 1868. Alomyoidx, Family ;]1, Fokstkk, Verb. d. naturli. Ver. pr. Illicinl., XXV, 



pp. 144 and 194. 

 1894. Alomijiin, Tribe III, Ashmead, Proc. Ent. 8oc. Wash., Ill, p. 278. 



1 have followed Forster in retaining- this group as distinct from the 

 Icliveumonini^ where some authorities would place it, or from the 

 PJi<V()(jen!nl. where others would place it. To me it seems to approach 

 nearest to the Phceogenin!^ hut is readily separated by its metanotal 

 characters and hy the shape of the metathoracic spiracles. 



Only a single genus is known in the group, distinguishable as 

 follows: 



Form elongate; metathorax smooth, exareoiated, the spiracles large, oval; abdomen 

 elongate, smooth and polished, the sides parallel, the second segment irllliout 

 gastroca'li; antennae with the joints of the flagellum short, in female not (jr 

 scarcely twice as long as wide, in male the joints, except the first, not longer than 



wide; head (juadrate ( 72) Alomya Panzer. 



(Type, Almni/a nvuld Panzer.) 



Tribe VI. PHvEOGENINI. 



1868. Phpcogrnoidfc, Family MO, Foksteh, Verb. d. naturh. Vcr. pr. Rheini., XXV, 



pp. 144 and 191. 

 1894. Phxogen'mi, Tribe V, Ashmead, Proc. Ent. See. Wash., Ill, p. 278. 

 1898. Cyclopneustici, Subtribe, Berthoumieu, Ann. Soc. Ent. France, LXV, p. 8.'!2. 

 1900. Pfipeogenini, Tribe VI, Ashmead, Smith's Insects of New Jersey, p. 5(58. 



To this tribe belong a large number of the smaller ichneumonids, 

 separated at once from those in the other tribes by the small, rounded, 

 or circidar metathoracic spiracles. 



It is believed that the genera falling here can he readily distin- 

 guished by the use of the following table: 



TABLE OF GENERA. 



Scutellum not especially elevated 2 



Scutellnm very convex and elevated. 



Tip of a})domen acute, the ovipositor quite straight; head transverse-quadrate, 

 the temples as wide as the eye; lunul;e large transverse, more or less 



confluent (78) hclmus Gravenliorst. 



(Type, Ischnus Ihoracicus Gravenliorst.) 



