Sept., '03] ENTOMOLOGICAL NEWS. 233 



0.704-0.759 mm. in length, 0.352-0.385 mm. in breadth, and 

 from 0.240-0.245 mm. in thickness. When viewed with a high 

 power lens they are found to be distinctly convex on one side 

 and slightly concave on the other, and when seen from either 

 of these surfaces they exhibit an almost perfectly oval form. 

 Occasionally at one end there is a slight projection, giving to 

 the egg, when this exists, a contour not unlike that of a pecan. 

 When examined under a comparatively high power of the 

 microscope the surfaces of the eggs are seen to be beset with 

 numerous, transparent, thorn-like projections, all of which 

 usually lie at an acute angle, and all point in the same direc- 

 tion ; this angle is one of about 45 as a rule, but the inclina- 

 tion may be greater or less in some instances' being even at 

 right angles with the surface upon which they lie. These 

 projections are from 12-14 >>. in length, and from 7-8 <>. in 

 width. Their free ends are usually rounded, and present a 

 knob-like appearance in many instances. 



The Psorophora ciliata that laid these eggs was removed 

 from the water and again placed in the cage where in a very 

 short time the insect entirely recovered. 



Prof. Howard states that he has been unable to obtain the 

 eggs of this mosquito, although he has kept them in cages 

 with this object in view for a considerable length of time. I 

 cannot say with certainty as to the cause of my success in this 

 matter, but would suggest the possibility that this may be the 

 result of the insect in this case having had a full meal of blood 

 some five days previous to the time the eggs were deposited. 

 It may be possible that the Psorophora must have blood in 

 order that the eggs may properly mature within their bodies. 



A New Roach of the Genus Ischnoptera from Florida. 



BY JAMES A. G. REHN. 



The specimen on which this species is based was referred to 

 me for determination by Mr. C. W. Johnson, who collected it 

 at St. Augustine, Florida. It gives me great pleasure to dedi- 

 cate this striking species to the collector, as a slight token of 

 personal esteem as a friend and naturalist. 



