356 TRAVELS AMONGST THE GREAT ANDES, chap. xix. 



remainder, have been compared with the collections in the British 



(Natural History) Museum, and it is found that the following 



families and genera are included amongst them. 



The Tenthredinidm are represented by a species of Strongylogaster. 



There are several species of Ichneumonidce, apparently belonging to the 

 genera Ichneumon, Mesostenus, OpMon, Hemiteles, Cryptus, Echthrus, and 

 Lissonota (?). 



There is a single small species belonging to the family Chrysididce. 



The Dorylidce are represented by a single species, apparently belonging 

 to Ldbidus. 



In Scoliidm there are three handsome species of Dielis. 



In Pompilidce several species belonging to the genera Pompilus and Pepsis 

 were obtained. 



In Sphegidm there are two species of Sphex. 



The VespidcB are represented by species of Polistes and Polyhia. 



The greater part of the collection, however, consists of Apidce 

 (Bees), and the species obtained appear to belong to the following 

 genera : Megacilissa, Halictus, Ceratina, Melissodes (?), Eucera (?), 

 Anthophora, Megachile, Xylocopa, Euglossa, Enlema , Bombtis, Tetra- 

 pedia, and Trigona. Among these, a black and white Bomhis, 

 closely resembling a Chilian species, is particularly common. 



The species that are believed to come under Dielis include the 

 formidable insect which is figured upon p. 90 under the nickname 

 of ^''the Bishop.'^ This seemed to be very widely distributed. It 

 was obtained at various places between 7500 - 11,000 feet, and 

 was seen as high as 12,000 feet. Another large and equally 

 stinging Dielis was taken by myself on the Plain of Tumbaco, 

 but was seen there only. Two large and beautiful species which 

 are believed to come under Pepsis were captured between 11- 

 12,000 feet on Pichincha, at 12,000 feet on Illiniza, and at a 

 similar altitude upon Ootocachi. These four above - mentioned 

 insects were the largest of the Hymenoptera taken anywhere in 

 Ecuador. Several other species were obtained as high as 12,000 

 feet, and two at greater elevations, namely, an Ichneumon in the 



