282 feNtOMoLOGICAL NfeWS. [KoV., *05 



number and character of the spines, for the short, rounded 

 anal flaps, and for the strong mandibles fitting it for a carni- 

 vorous existence. We fed the larvae entirely on Culex larvae 

 and great numbers of the latter were devoured. For example, 

 three Megarhinus larvae in four days ate 83 large Culex larvae, 

 besides many small ones just hatched from eggs put in by us 

 but which we could not count. The abdomen of the larva 

 bristles with long, slender, much branched spines. The 

 thorax carries conspicuous, short, stiff, dark spines and two 

 spines of the same character are found on each of the abdomi- 

 nal segment (a, Plate X). The larvae transformed to pupae 

 on September 28th. 



The pupae are not strikingly different from those of other 

 mosquitoes except, of course, in size. They are somewhat 

 larger and darker than those of Psorophora, and most of the 

 abdominal segments have a few long, slender spines. The 

 respiratory tubes are long and open obliquely. The pupal 

 stage of two pupae lasted four days while that of the third 

 extended over a period of five days. The anal flaps seem to 

 have a characteristic shape (m, Plate X) and the edges, for 

 the most part, are beset with short, stiff spines. 



We reared three adult males from the larvae and they differ 

 somewhat from Mr. Theobald's description given in his Mono- 

 graph of the Culicidae, Vol. I, page 232. He says the penulti- 

 mate segment of the palpi is as long as the last. In the three 

 specimens bred, the penultimate segments were only half as long 

 as the last (h, Plate X). Moreover, the head is bluish green 

 (iridescent) instead of brown and the penultimate segments of 

 the hind tarsi are white except a black ring at the distal ends. 

 These variations are hardly enough to establish a new species 

 and Mr. Coquillett, to whom I referred the specimens, says 

 they are undoubtedly portoricensis . 



In addition to the foregoing species we find Megarhinus 

 rutila, common here, in fact more numerous than portoricensis . 



Stegomyia fasciata. — Among the specimens of this mosquito 

 taken here we find a variety in which the abdomen is creamy 

 white, except the last segment. It corresponds with Theo- 

 bald's variety, queenslandensis^ except that the mid lobe of the 

 scutellum is all white instead of blue. 



