24 ENTOMOLOGICAL NEWS. [Jan., 'o8 



it certain that there is only one annual brood and that hiberna- 

 tion is in the larval stage. 



Mr. Grossbeck has prepared the following description of the 

 larva ready for hibernation and apparently in the last stage, 

 though probably not quite full grown. The illustrations will 

 supplement the description. 



Description of the larva (PI. IV, Fig. i) : 



Length, 6 to 7.5 mm. = .24 to .30 of an inch from head to end of ninth 

 abdominal segment. It is a robust wriggler resembling in life the 

 larva of Culex jamaicensis. In color it is white tinged with a clear 

 transparent green which is of ten. the predominating hue. The head is 

 pale brown, much broader than long, rounded in front and flat at the 

 sides ; four large and four small tufts of hair arise from the vertex, 

 two of the large ones of 6 or 7 hairs each from the central portion, 

 between which the four small tufts are situated, and one of 10 or n 

 hairs near the base of each antenna. Of the small tufts the anterior pair 

 are each composed of 6 hairs, the posterior pair of 7 each. There is 

 also another pair of moderate sized hair tufts near the base of the 

 head just below and inward of the eyes; these are composed of five 

 hairs each. The eyes are remarkably small, black, and placed far 

 down on the sides of the head. The antenna (Figs. 3 and 4) is very 

 long and somewhat filamentous, infuscated at basal third and almost 

 colorless beyond ; a large tuft of 18 to 20 long hairs arises from an 

 offset at the basal third and from this point the shaft is continued 

 for some little distance apparently as a thickened side of a hollow 

 tube which is open on one side to the apex of the main shaft; this 

 apex is terminated by two long needle-like spines and the filamentous 

 process has at its end a very small articulated spine. The mentum 

 (Fig. 5) is triangular in form with a deeply excavated base and six 

 large teeth on each side of an apical one besides a small tooth which 

 is sometimes present near the base. The mandible (Fig. 6) presents 

 much the appearance of that of the ordinary Culcx (sens, lat.) type 

 but has three curved dorsal spines and the teeth are small and situated 

 some distance back from the apex. The maxillary palpus (Fig. 7) 

 offers little that is peculiar, but the subapical spine is exceptionally 

 long and blade-like and the basal process is rather small with curved 

 apical teeth. 



The thorax and abdomen are normal in form, the former with the 

 usual number and location of long hair tufts ; but the abdomen has 

 only one tuft, of two hairs on each side of the first segment, the fol- 

 lowing five each having but a single* long lateral hair, while segments 

 7 and 8 have none except the several short hairs which are common to 

 all segments. The eighth segment bears the lateral patches of scales, 



