114 AMERICAN HYMENOPTERA. 



hair on the upper part of head and thorax than does the type, but 

 otherwise agrees. 



.^IeliS!<»odcs autiiinnalis Bob. 



A 9 from Fedor, Texas, November, 1903, is exceedingly like 

 M. cnici, but differs by the longer and more abundant hair of thorax 

 above ; the hair of occiput light, while that of vertex is entirely 

 black (thus reversing the condition in cnici); hair of cheeks partly 

 light and partly dark, but mainly light; mouth-parts smaller and 

 weaker in every way. The abdomen is quite without bands. This 

 agrees so nearly with Robertson's brief diagnosis of 31. autumnalis, 

 that I suppose it to be the same. It was collected by Mr. Birk- 

 maun. 



Tetralonia aiinse n. sp. — 9 • Length about 13 mm. ; width of abdomen 

 5; length of anterior wing about 8i. Black, the head and tliorax with greyish 

 white hair; antennse black, but the first few joints of the fiagelluni appear some- 

 what reddish, from a very fine reddish pile or tomentum ; eyes reddish grey ; 

 malar space distinct; mesothorax dullish, with conspicuous but not deep punc- 

 tures; tegulae rufous, darker in front; wings slightly dusky; hair of anterior 

 tarsi and middle tibiae reddish fuscous; of middle tarsi and hind tibiae and tarsi 

 more orange, but ferruginous within ; hind tibise and basal joint of tarsi broad, 

 the scopa consisting of coarse bristles ; hind spurs normal; abdomen with broad 

 bands of pale grey or greyish white (not in the least yellowish) tomentum on 

 segments 2 to 4; segment 5, like those before it, is black at base, but the broad 

 fringe is fuscous for the middle third, with the outer thirds white, the white 

 overlapped by a few dark hairs. 



In my tables this will run in the neighborhood of T. cressoniana, 

 actuosa and donuta ; or except for its size, near to speciom. These 

 species are easily separated as follows : 



Mesothorax with erect fuscous hair donata (Cress.). 



Mesothorax without such hair 1. 



1. Length much over 15 mm speciosa (t'ress.). 



Length less than 15 mm. 2. 



2. Hair of thorax above fulvous; abdominal bands not very broad; base of sec- 



ond segment covered with white tomentum. •crt'ssoiiisiiia (Ckll.). 

 Hair of thorax above not fulvous 3. 



3. Smaller; mesothorax dull without obvious punctures; bands of abdomen not 



especially broad ; base of second segment with inconspicuous pale 



hair acfuosa (Cress.). 



Larger; mesothorax distinctly punctured ; bands of abdomen very broad ; base 

 of second segment covered with black tomentum iiiiiiic Ckil. 



T. annce differs from belfragei by the smaller size, much narrower 

 apical plate of abdomen, abdominal bands not brilliant white, color 



