IMartiniquo are not favourable to gnat-larva?, while the stagnant ponds and 

 tanks of Antigua are congenial to them in a high degree. The whole tribes 

 of Chironomida, TipuUdai, EinpidcB and Tahanidoi seem unrepresented. 

 Horses and cattle are indeed infested with an Ixodes of large size (imported 

 originally from Puerto Rico), but they enjoy complete immunity from 

 dipterous plagues and blood-suckers. At a hovel in the mountains of 

 Martinique I took a single Bihio, with black wings and testaceous thorax. 

 In the same island occurred one Asilus, and several of a cognate genus 

 having a peculiar neuration. The following Diptera I may venture to 

 name : — 



Heiiietia sexniaculata, Mcq. On flowers, Martinique ; one from Antigua. 



Eristcdis vittatus, Mcq. Common ; Martinique and Antigua. 



(Voliicella?) obesa, F. Rather scarce ; Martinique. 



Lucilia jmtrida, F. Not common ; Martinique and Antigua. 



Lucilia macellaria, F. This fly exists in considerable numbers, and, in 

 conjunction with a red-tailed Sarcophaga, frequents carrion. The house-fly, 

 which swarms everywhere, and especially near sugar-mills, answers the 

 Fabrician description of M. occidua, except that he states it to be " triple 

 minor" than M. domestica. Tt is, however, rather larger and far more 

 importunate. 



A good-sized Tacjiina occurs in Antigua, but is very rare. In Martinique 

 I found a species of Dexia. The Anthomijildm are not represented. The 

 smaller MuscidcB are few in number ; I have noticed a Drosophila which 

 feeds on paste ; and the Agave Americana is inhabited by an Oscinis. The 

 Pidicida; are reasonably common, and among them the notorious Sarcopsylla 

 jwnetrans, Westw., inhabits the interstices of boarded floors; I have taken 

 the male in my house. 



Aeachnida and Myeiopoda. 

 In Martinique I took a fine series of Mygale versicolor, Walck. The 

 blue and red hairs vfhich adorn this species during life considerably mitigate 

 its repulsiveness. In resides in holes of trees, spinning a silken curtain, 

 or door, to close the entrance, and is an inoffensive and rather sluggish 

 animal. Antigua produces, instead of this, Gteniza nidulans, Walck. In 

 Martinique I captured two large specimens of Phrynus marginemacidatus, 

 Koch. Uniting several of the attributes of crab, scorpion and spider, to a 

 diabolical disposition, these beings are perhaps Nature's masterpiece of 

 hideousness. They are found clinging to the under-surface of stones, and 

 when molested run backwards and sideways with great celerity, presenting 

 their spiny pincers at the enemy, while the first pair of legs, useless in 

 progression, is thrown over the back. These singular organs are 5i inches 

 long in one of my specimens. In Antigua occurs a much smaller kind, 

 P.pumilio, Koch. There are two species of scorpion, one an elongate pale 



