348 MEMOIRS OF THE CARNEGIE MUSEUM 



longitudinal grooved lines, rarely fire, but never lens than tuv Icjngitudinal grooved 

 lines. 



The species falling in this group are not restricted in their liabits, but attack 

 nearly all orders of insects. They have been bred, according to the records, from 

 the larva? of Coleoptera, Lepidoptera, Hymenoptera, Diptera, Orthoptera, Neurop- 

 tera, Odonata, etc., and appear to be both primary and secondary parasites. 



The vast majority of them, however, appear to be primary parasites upon the 

 gall-making or gall-inhabiting insects in the Orders Diptera, Hymenoptera an'd 

 Coleoptera. 



The curious, and in some respects anomalous, genus Mclittohia Westwood is para- 

 sitic in the nests of bees and wasps, and is said to attack not only these insects but 

 also other hymenopterous parasites of the bees and the wasps, i. e., Monodontomerus, 

 etc. In this c(juntry species have been bred from the nests of bees and wasps, just 

 as in Europe, but here we have podtive evidence that they came from the puparium 

 of a Dipteron, and I have, therefore, my doubts as to the genus being a primary 

 parasite of bees and wasps. 



TABLE OF GENERA. 



1. Females 2 



Males 13 



2. Mesonotum wilhont a median grooved line 3 



Mesonotum with a median grooved line 7 



3. Pronotum transverse, not conical, or .subquadrate or rounded anteriorly 4 



Pronotum long, conical. 



Aiitennse 9-jointed, inserted near the mouth l)ordcr ; abdomen longer than the head and tliorax 



united, subcompressed, the ventral valve prominent Melittobia Westwood 



(type Cirronpiliis acasia Walk.). 



4. Antennte 9-jointed, with one ring-joint. 6 



Antenn.-e 10-jointed, with too ring-joints. 



Abdomen very long, conically produced, two or more times longer than head and thorax 



united 6 



Abdomen not long, either ovate or conic-ovate and not or rarely much longer than the head 

 and thorax united. 



Abdomen above depressed or concave, never cylindrical, either carinate or convex be 



neath, polished, the segments not subequal Tetrastichodes Ashmead 



(type T. floriilanus Ashm.). 



Abdomen cylindrical, convex above, never depressed, shagreened or punctate, never 



smooth, the segments subequal ; funicle joints cylindrical, at least twice as long as 



thick Trichoporus Fcirster (type unknown). 



/). Metanotum usually very short, with a A-shaped median carina, each fork diverging towards the lateral 



hiiid angle, more rarely with a straight median carina Hyperteles Forster 



(type Euluphus clongahia Forster). 



