﻿280 THE ENTOMOLOGIST. 



the wings also are rather less ample perhaps, and rather straighter 

 along the costa. A female specimen has a long, pale ovipositor. 

 There is a label, presumably written by Barnston, " 15 out round 

 gall," with another word I fail to decipher. 



There is, therefore, every probability that spongivora is the 

 same as s-batatas ; but under the circumstances I should hardly 

 be justified in overthrowing Walsh's well-known name for an 

 older one, which, after all, may possibly belong to something 

 different. 



With the types of spongivora in the British Museum there is 

 a second species from Hudson's Bay, labelled (apparently by 

 Barnston) " lasiopterides, from willow-rose." It is certainly 

 different from spongivora, having a sand-coloured thorax with two 

 dark longitudinal bands. I am not aware that this C. lasiopterides 

 has been described, and it would hardly be wise to attempt a 

 description from the Museum material. 



Cecidomyia salicis-brassicoides, Walsh. 



Imago. — <?. Long. 8, al. exp. 3 mm. Head black; antennae with abun- 

 dant long white hairs. Thorax black ; halteres dark grey. Abdomen black 

 or nearly so, with sparse long hairs ; genitalia everted on a pedicel, inclined 

 upwards ; forceps black (pale at ends), greatly curved ; style brownish, broad 

 and thick. Legs grey-brown. Wings hyaline ; venation as in C. rigidce. 



Described from fresh specimens, bred from galls on willow, 

 West Cliff, Colorado, May, 1889. 



This is the species, very common at West Cliff, which I have 

 before called s-strobiloides, it having been so named for me at 

 Washington. I think there is no doubt that it is really Walsh's 

 s-brassicoides, with which the galls especially agree more than 

 with any other described species. 



These West Cliff galls occur in bunches, several together, 

 as is described by Walsh, and are very suggestive of compact 

 sprouts on a cabbage-stump ; they taper somewhat at the end, 

 being obversely pyriform ; the leaves or scales covering them are 

 mostly rounded. 



Cecidomyia frater, n. sp. (vel orbitalis, Walsh, var. ?). 



Imago. — $. About 2 mm. long. Halteres pinkish. Abdomen somewhat 

 pinkish. Venation as in C. bigelovice. Antennae about 18-jointed. Other- 

 wise much like C. s-brassicoides, except in genitalia. 



Hab. West Cliff, Colorado. Bred May 19th, 1889, from gall 

 of C. s-brassicoides. 



This is clearly not Walsh's C. cornuta, but it is evidently very 

 close to C. orbitalis. I should hesitate about describing it were 

 it not that the male genitalia afford an easy means of distinguishing 

 it from s-brassicoides, the terminal portion of the forceps being 

 much more slender, and with coarser hairs, than in that species. 

 In C. s-batatas (West Cliff examples) the terminal joint of the 



