velocity, in the hottest situations only, and is best captured by seeing it enter 

 a burrow, and then digging it out, if the operator can endure the sun's rays 

 for a sufi&cient time. 



Scolia {Colpa) ruhida, St. F., is one of the commonest of Hymenoptera, 

 on tlowers, in Martinique and Antigua. 'Llie undescribed male strikingly 

 resembles canescens, Scop. To hazard a conjecture as to the origin and 

 habits of this abundant species I suspect it would be found to be a parasite 

 of the dark brown Lamellicorn of which I send home specimens (No. 10), 

 and which is the only beetle found in Antigua of sufficient size and 

 frequency, for FJiileurus is much too rare. 



Plesia hamorrhoidalis, F. (male and female). I had the good fortune to 

 secure a pair of these insects in Martinique. The male is undescribed. 



Odontomachus iinisjyinosus, F. The largest ant I have seen in the West 

 Indies. It forms small colonies under stones in woods. In one of these 

 were the winged sexes, but they all escaped. Many winged Formicidu;, 

 including a large Ponera, habitually visit my lamps at night, but 1 cannot 

 refer them with certainty to their respective workers. Martinique and 

 Antigua. 



Formica sex-guttata, F. Common. I have taken the male and female 

 from a nest. Antigua, 



Formica castanea, Latr. Forms large nests in rotten wood. Workers 

 only found. Martinique. 



Myrmica melanocephala, F. A minute and active species, which is a 

 pest in houses in Martinique, and destroyed some valuable specimens of 

 mine. Apparently not found in Antigua. 



Aphanogaster vorax, F. ? Perhaps the name of the common red ant. 

 None of the Formicida hibernate here ; they are to be found feeding their 

 larvae, and actively employed at all seasons, though in diminished numbers 

 from November to March. 



PejJsis rubra, Drury. Very abundant in iVntigua and Montserrat, but 

 not in Martinique. A splendid insect, conspicuous for its scarlet wings. 

 The red colour is due to scales, which are liable to be rubbed off, as in 

 Lepidoptera. In old abraded specimens of the female the wings are almost 

 hyaline. The undescribed male differs in having the wings blue-black, with 

 only a small red patch in the middle, and is liable to vary much in size, 

 some dwarfish individuals not exceeding four lines in length. These 

 males have a singular habit of congregating towards sunset in large 

 numbers, apparently for no other object than to sleep in company, on the 

 branches of trees and shrubs. I counted over seventy 'in one of these 

 swarms, without a single female, and fresh arrivals were taking place every 

 moment. A larger Pepsis, blue-black, with white tips to the wings, takes 

 the place of this species in Martinique, but I only succeeded in capturing 

 one specimen. A third species, also from Martinique, has a little red on 



